Free Microsoft Outlook Resources & Whitepapers

outlook.ost is in use and cannot be accessed.

I have a user with Windows 7, Office 2007, and using Exchange 2010.
When she tries to attach a file to an e-mail by right clicking the file and selecting "Send To - Mail Recipient" or "Compress and E-mail" it gives her the error message "the file *****outlook.ost is in use and cannot be accessed. Close any application that is using this file, and then try again. You might need to restart your computer." She has had this problem for several months now, we just recently recreated her outlook profile when we brought our Exchange Server in house so I know that its not a profile issue. the file is there at that file path so that's correct. nothing else is using it. the only thing i can think of is that her .ost file is over 4-5GBs. any thoughts?


Post your answer or comment

comments powered by Disqus

I am receiving the error message

"The file C:Documents and SettingsnameLocal SettingsApplication DataMicrosoftOutlookOutlook.pst is in use and cannot be accessed. Close any application that is using this file and then try again"

But I cannot seem to find any application that is using this file. It appears that my computer unknowingly made an 'alternate' copy of Outlook but I do not know where it is on my computer or how to retrieve the original where all my mail is going.  I currently cannot send or receive any email  Can anybody help?

I tried to change the starting tme of an appointment and got a message that
said, "The file... is in ue and cannot be accessed. Close any application
that is using this file, and then try again. You might need to restart your
computer." However - no other application is running and retating the
computer did not help.

I receive this error about every 10 minutes while connected using Outlook
2003 Pro. on Vista Business

The file C:UserskatalAppDataLocalMicrosoftOutlookou tlook.ost is in
use and could not be accessed. Close any application that is using this file
and then try again.

I can't figure out what has it opened except Outlook.

I work in a small office with a Microsoft Exchange server. We have two
machines that both log on using an account with the username "DAC".

When onw user is looged on with this account on one machine, the other
cannot access the outlook.ost file and Outlook closes (there is no "cancel"
option on th error dialogue).

The error message returned is:

"The file serverhomedacoutlook.ost is in use and cannot be accessed.
Please close any application that may be using it and try again"

Problem being that this means the other user has to close outlook when we
need both users to be able to access it at the same time.

Help please!!?

Thanks in advance
~Mark

Error message when Outlook starts and when I try to access my pst from nav
panel or from toolbar:
"Cannot expand the folder. The file c:Users . . .pst is in use and cannot
be accessed. Close any application that is using this file, and then try
again. You might need to restart your computer."

This is first time in 2 years of use that I have any error from Outlook.
Error continues after restart or full reboot. Open outlook, left nav panel
shows name of my pst file but will not expand the tree. Inbox and inbox
messages display in center panels, to do bar and task list display at right.

Local machine, Vista Ultimate 32bit, Outlook 2007, single user, single pst
file, business contact manager is installed but I do not use this at all,
Palm PDA with Chapurra Key Suite interface, no new files or changes in 2
years except MS updates.

Error message when Outlook starts and when I try to access my pst from nav
panel or from toolbar:
"Cannot expand the folder. The file c:Users . . .pst is in use and cannot
be accessed. Close any application that is using this file, and then try
again. You might need to restart your computer."

This is first time in 2 years of use that I have any error from Outlook.
Error continues after restart or full reboot. Open outlook, left nav panel
shows name of my pst file but will not expand the tree. Inbox and inbox
messages display in center panels, to do bar and task list display at right.

Local machine, Vista Ultimate 32bit, Outlook 2007, single user, single pst
file, business contact manager is installed but I do not use this at all,
Palm PDA with Chapurra Key Suite interface, no new files or changes in 2
years except MS updates.

Hello all,

Thank you in advance for any help!

MS Outlook does not connect with my other programs. I cannot send emails from other programs. This is on a Corporate computer with Windows7 x64. My HelpDesk is in India and not terribly helpful.

The Calendar Printing Assistant gives the message below. Quote: Cannot connect to Microsoft Office Outlook 2007. Please restart MS Outlook 2007 and Calendar Printing Assistance. Original MS Outlook 2007 error message: Object reference not set to an instance of the object. Excel, Adobe, and other apps give the error below, but the path to the ost is correct and I have restarted my computer MANY times. Quote: The file D:.....outlook.ost is in use and cannot be accessed. Close any application that is using the file, and then try again. You might need to restart your computer. This is what I have tried to date:
Complete uninstall and reinstall of all MS Office products. This included using RegCleaner and a manual review of the registry for Office related entries. I've done this twice, once also using Revo Uninstaller Pro. Created a new profile from Mail Setup, located under the Control Panel. Turned off the offline Folder File options, various versions of the settings for this feature, and later re enabled it. Tried all the outlook start-up switches. Deleted the OST and let outlook recreate it from scratch.

Hi everyone. I have started a new job and I am having an issue with my
Outlook. Whenever I try to open it to get my emails, I get the following
error message:

C:/Documents and Settings/myname//Local Settings/Application
Data/Microsoft/Outlook/outlook.ost is in use and cannot be accessed.

It then goes on to suggest that I close other applications, then it shuts
down.

Please note the file extension as OST and not PST.

Any help you can provide would be greatly appreciated.

~Andrea

Hi,

When I open my outlook I get the "messaging interface unknown error" message.

I also cannot see my inbox, my calendar and my sent file and I cannot send
emails. I can see my Personal files, deleted items and drafts.

In my inbox I get a message that says "cannot display information. There is
either a problem connecting to the servew or an error occured. Try starting
Outlook again.

When I click on my calendar I get a whole different message that says
"cannot display folder. The file documents and settings/lblake/local
settings/application data/microsoft /outlook/outlook.ost is in use and cannot
be accessed. Close any application that is using this file, and then try
again.

I have restarted several times and I don't know what to do. I need to have
access back to my inbox!

Any suggestions would be GREATLY appreciated.

Hi,

When I open my outlook I get the "messaging interface unknown error" message.

I also cannot see my inbox, my calendar and my sent file and I cannot send
emails. I can see my Personal files, deleted items and drafts.

In my inbox I get a message that says "cannot display information. There is
either a problem connecting to the servew or an error occured. Try starting
Outlook again.

When I click on my calendar I get a whole different message that says
"cannot display folder. The file documents and settings/lblake/local
settings/application data/microsoft /outlook/outlook.ost is in use and cannot
be accessed. Close any application that is using this file, and then try
again.

I have restarted several times and I don't know what to do. I need to have
access back to my inbox!

Any suggestions would be GREATLY appreciated.

I have been using Outlook 2007 for 18 months now with no problems but last
night it started playing up. I cannot delete emails & when I try to send
emails they go into my out box and stay there and again I cannot delete them
although the email has in fact been sent. The error message I get is the one
listed in the Subject Line
I have run the Office "repair" disk but I still have the same problem

Hi, here's a relatively tough one for the forum's gurus.

I'm running Windows XP SP3 on a Dell XPS M1530 laptop with Intel Core Duo at 2Ghz with 2GB RAM. I am running Office 2003 Professional Edition, Firefox, McAfee Viruscan Enterprise 8.5.0i, Windows Desktop Search 4.0, Skype and a few more apps, but not that much crap installed.

I run Outlook in cache mode, with the outlook0.ost file being at 301MB and the Exchange mailbox size is 271Mb (I just compacted the OST file). I currently have 5 PST files for 2004, 2005, 2006, 2007 and 2008 year emails. For professional reasons I should keep all my emails & appointments. Their sizes are respectively 0.2Gb, 1.7Gb, 2,7Gb, 3.5Gb and 3.4Gb. The current-year PST stores everything older than 2 months. I don't expect 2008 and 2009 PST files to grow over 4Gb. By the way, all PSTs are recently compacted.

I have Windows Desktop Search setup to index all PST files as this is something I really need (I might perform 10 email searches per day, 50% including 2008 emails). WDS also indexes "My Documents" with about 5.000 items, while the whole index (including the PST files) goes to about 250.000 items.

Both My Documents folder and the PST files are on an encrypted partition using Truecrypt 6.0a with Twofish. TC's benchmarks reports 125Mb/sec read and 119MbMb/sec wirte speeds with the 1Mb buffer option, averaging to 122Mb/sec. This is second to AES cipher performance which gets 138, 138 and 138 respectively. That's about 13% faster than Twofish on my system. If needed, I can change from Twofish to AES I think. However, I cannot do without encryption.

The PST files were defragmented about 15 days ago and specially the '04, '05, '06 and '07 don't get any changes nowadays.

Overall, the laptop's experience is decently good, I don't have to much crap installed in it. I can simultaneaously run Outlook, Firefox, Excel, Photoshop, Skype and something else quite well.

The problems I am experiencing are Outlook-related. When I run it, it might take a few secs to sync the inbox but that's fine. Running a WDS search will find emails pretty well & fast.

However, after a few minutes I will start getting a popup with this message:

"{mypathhere}outlook0.ost is in use and cannot be accessed. Close any application that is using this file, and then try again".

Appart from the annoying popup (which might come in bundles of 3-4 every 10-15 minutes), the worst effect is the fact that it makes the PST files unavailable from Outlook. They still appear on the left folder menu and WDS can still find and show me their emails in the preview pane (because they are indexed) but I cannot open them. The only way around I have found so far is to restart Outlook and do the searching *before* I get the popups again.

When I travel and I have slower connections, this tends to happen more often so I suspect there's something to do with network problems... although this should not be the case at our office (where pinging the Exchange server give a consistent 1ms).

Reducing the number of open PST files open from Outlook seems to help. Right now, I have only 2007 & 2008 and I haven't being blocked for 20 minutes but this is painful because WDS is right now de-indexing the older PSTs so once I open them again (1) they will not be searchable and (2) WDS will need quite some CPU cycles and time to re-index them. So I really need to have all PSTs available at all times.

I think there might be some problem with WDS. When the popup appears, I see a few READ REQUESTS to outlook0.ost from both OUTLOOK.EXE and searchprotocolhost.exe returning a a SHARING VIOLATION error using Sysinternal's Filemon app. Many other READ REQUESTS return SUCCESS though. It's like WDS and Outlook interfere with each other until WDS blocks access to the OST and the the PST files are unreadable... !??

I hope I have given all the needed info... now it's time for you gurus help me somehow :-)

Thanks in advance
J

Hi, here's a relatively tough one for the forum's gurus.

I'm running Windows XP SP3 on a Dell XPS M1530 laptop with Intel Core Duo at 2Ghz with 2GB RAM. I am running Office 2003 Professional Edition, Firefox, McAfee Viruscan Enterprise 8.5.0i, Windows Desktop Search 4.0, Skype and a few more apps, but not too much crap installed.

I run Outlook in cache mode, with the outlook0.ost file being at 301MB and the Exchange mailbox size is 271Mb (I just deleted the ost file and let OL sync everything). I currently have 5 PST files for 2004, 2005, 2006, 2007 and 2008 year emails. For professional reasons I should keep all my emails & appointments. Their sizes are respectively 0.2Gb, 1.7Gb, 2,7Gb, 3.5Gb and 3.4Gb. The current-year PST stores everything older than 2 months. I don't expect 2008 and 2009 PST files to grow over 4Gb. By the way, all PSTs are recently compacted.

All PST files were scanned with SCANPST.EXE yesterday. All had errors and all were corrected by the app. The PST files were defragmented about yesterday too and the '04, '05, '06 and '07 don't get any changes nowadays.

I have Windows Desktop Search setup to index all PST files as this is something I really need (I might perform 10 email searches per day, 50% including

Hi, here's a relatively tough one for the forum's gurus.

I'm running Windows XP SP3 on a Dell XPS M1530 laptop with Intel Core
Duo at 2Ghz with 2GB RAM. I am running Office 2003 Professional
Edition, Firefox, McAfee Viruscan Enterprise 8.5.0i, Windows Desktop
Search 4.0, Skype and a few more apps, but not that much crap
installed.

I run Outlook in cache mode, with the outlook0.ost file being at 301MB
and the Exchange mailbox size is 271Mb (I just compacted the OST file).
I currently have 5 PST files for 2004, 2005, 2006, 2007 and 2008 year
emails. For professional reasons I should keep all my emails &
appointments. Their sizes are respectively 0.2Gb, 1.7Gb, 2,7Gb, 3.5Gb
and 3.4Gb. The current-year PST stores everything older than 2 months.
I don't expect 2008 and 2009 PST files to grow over 4Gb. By the way,
all PSTs are recently compacted.

I have Windows Desktop Search setup to index all PST files as this is
something I really need (I might perform 10 email searches per day, 50%
including


I had Outlook 2003 on my old computer.  Just moved everything to the new Windows 7 with Outlook 2010 using an "Easy Transfer" cable.

Outlook worked fine for a few days.

Now, I am starting to get this error message ONLY sometimes when I try to move some emails from my Inbox to a folder:

Cannot move the items.  file access is denied.  You do not have the permission required to access the file C:UsersUsernameAppDataLocalMicrosoftOutlook Outlook.pst.

Closing and reopening Outlook does not fix it, as I then get this error message

Cannot start Microsoft Outlook.  Cannot open Outlook window.  The set of folders cannot be opened.  The file C:UsersUsernameAppDataLocalMicrosoftOutlook Outlook.pst is in use and cannot be accessed.  Close any program that is using this file and then try again.  You might need to restart your computer.

I did check that this file is not set to "read-only".

Rebooting is the only fix, but it's only temporary!  I am able to do everything for a little bit, then it happens all over again.

Any suggestions on what I can do, please?

 

Whenever I open up my Outlook (2007), I automatically log on to several other peoples mailboxes. After I open up Outlook, I can go into the System Manager for Exchange 2003 and my name appears by several mailboxes which I did not purposfully log onto. Why does this happen and how can I stop it. Also, here is a copy of the Synchronization log that I got:
-----------------------------------------------------
7:05:17 Synchronizer Version 12.0.6024
7:05:17 Synchronizing Mailbox 'ME'
7:05:17 Synchronizing Hierarchy
7:05:17 Synchronizing server changes in folder 'Inbox'
7:05:17 Downloading from server 'server'
7:05:17    1 item(s) added to offline folder
7:05:17    2 item(s) deleted in offline folder
7:05:18 Synchronizing server changes in folder 'Calendar'
7:05:18 Downloading from server 'server'
7:05:18 Synchronizing server changes in folder 'Deleted Items'
7:05:18 Downloading from server 'server'
7:05:19    4 item(s) added to offline folder
7:05:22 Error synchronizing folder
7:05:22                   [8004011D-10060101-20-0]
7:05:22                   The file C:Documents and SettingsmeLocal SettingsApplication DataMicrosoftOutlookoutlook.ost is in use and cannot be accessed. Close any application that is using this file, and then try again. You might need to restart your computer.
7:05:22                   Microsoft Office Outlook Offline Folders
7:05:22                   For more information on this failure, click the URL below:
7:05:22                   http://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=8004011d-10060101-20-0
7:05:22 Synchronizing server changes in folder 'User - Calendar'
7:05:22 Downloading from server 'server'
7:05:29    2 item(s) added to offline folder
7:05:29    1 item(s) updated in offline folder
7:05:29    7 item(s) deleted in offline folder
7:05:29 Synchronizing server changes in folder 'user2 - Calendar'
7:05:29 Downloading from server 'server'
7:05:29 Synchronizing server changes in folder 'user3- Calendar'
7:05:29 Downloading from server 'server'
7:05:31 Synchronizing server changes in folder 'user4 - Calendar'
7:05:31 Downloading from server 'server'
7:05:32    3 item(s) added to offline folder
7:05:32    6 item(s) updated in offline folder
7:05:32    1 view(s)/form(s) updated in offline folder
7:05:32 Synchronizing server changes in folder 'user5 - Calendar'
7:05:32 Downloading from server 'server'
7:05:32    1 item(s) updated in offline folder
7:05:32 Synchronizing server changes in folder 'user6 - Calendar'
7:05:32 Downloading from server 'server'
7:05:33    2 item(s) updated in offline folder
7:05:33 Synchronizing server changes in folder 'user7 - Calendar'
7:05:33 Downloading from server 'server'
7:05:33    1 item(s) updated in offline folder
7:05:33 Uploading to server 'server'
7:05:33    1 view(s)/form(s) added to online folder
7:05:33 Done
7:05:33 Microsoft Exchange offline address book
7:05:33 Download successful

I've changed names of course. Why am I synchronozing with these peoples calendars??

Thanks for any help!

This is the message I recieve
Cannot start Office Outlook. Cannot open the Outlook window. The set of
folders cannot be opened. The file C:/User/Owner/AppData/Outlook.pst is in
use and cannot be accessed. Close anyh application that is using this file.
and then try again. You might need to restart your computer
Help..


Cannot expand folder. The file F:nameoutlook.pst is in use and cannot be accessed. Close any application that is using this file, and then try again. You might need to restart your computer.

I have tried this as well as the repair tool and nothing helps.

 

the error message appears when I attempt to open the program, stating that
the file outlook.pst is in use and cannot be accessed. I haven't opened the
file (cause I've never figured out how to open a .pst file). How can I fix
this?

I have a user who can't open the calendar in Outlook 2007. The error message
is at the start of Outlook "Could not read the calendar" and then on the
calendar option to view one's calendar the message in the middle of the
screen is "cannot display folder".

I have ran the OST Integrity Check twice on the workstation. The second
time is after a restart. The results of the OST Integrity Check is as
follows....

First time....

15:03:51 Beginning offline folder file integrity check.
15:03:51 Performing initial synchronization.
15:03:51 Synchronizer Version 12.0.6211
15:03:51 Synchronizing Mailbox 'Katherine Slay'
15:03:51 Synchronizing Hierarchy
15:03:52 Terminated in error
15:03:52 [80040600-10060101-20-410]
15:03:52 The file C:Documents and SettingskslayLocal
SettingsApplication DataMicrosoftOutlookoutlook.ost is in use and cannot
be accessed. Close any application that is using this file, and then try
again. You might need to restart your computer.
15:03:52 Microsoft Office Outlook Offline Folders
15:03:52 For more information on this failure, click the URL below:
15:03:52
http://www.microsoft.com/support/prodredirect/outlook2000_us .asp?err=80040600-10060101-20-410

Second time after reboot...

15:16:31 Beginning offline folder file integrity check.
15:16:31 Performing initial synchronization.
15:16:31 Synchronizer Version 12.0.6211
15:16:31 Synchronizing Mailbox 'Katherine Slay'
15:16:31 Synchronizing Hierarchy
15:16:33 Terminated in error
15:16:33 [80040600-10060101-20-410]
15:16:33 The file C:Documents and SettingskslayLocal
SettingsApplication DataMicrosoftOutlookoutlook.ost is in use and cannot
be accessed. Close any application that is using this file, and then try
again. You might need to restart your computer.
15:16:33 Microsoft Office Outlook Offline Folders
15:16:33 For more information on this failure, click the URL below:
15:16:33
http://www.microsoft.com/support/prodredirect/outlook2000_us .asp?err=80040600-10060101-20-410

Does anyone have an idea what is going on? Any help would be great.

TIA

John

"Cannot start microsoft office outlook, cannot open outlook window The set
of folders cannot be opened the file C:/documents and settings/Michael
Moore/local settings/application data/microsoft/outlook/outlook.pst is in use
and cannot be accessed" Close any application that is using file and than
try again you might have to restart your computer

I've restarted computer several times? Same error. How do I check if .pst
file is open somewhere?

Thanks,

Mike

My outlook database suddenly became inaccessible, and the error message
recommended I run the Inbox repair tool. After finally finding scanpst, I
ran it (it took about 1 hour). The problem was not fixed. I got an new
error message: "Outlook.pst is in use and cannot be accessed..."

{When I could not find scanpst, I found a 3rd party product called Stelllar
Pheonix, ran the "free" download, then ran the solution, and was steamed to
find it only recovered the message headers before forcing you to buy the
product, which I did. Maddeningly, the program would not authenticate
online, forcing me through a convoluted manual registration that ultimately
required that I send a fax oversees. After I finally found scanpst, I ran
it and got the "in use" message. I then deleted Stellar and the "outlook
recovered pst" file it created during the demo version run. I plan to charge
back my Stellar purchase.]

Things I have tried since finding scanpst thus far:

-renewed Norton and ran scan, no viruses or problems
-ran scanpst again, twice
-defragmented hard drive
-compressed pst file
-ran scan pst again
-latest run of scanpst said "no errors found"
-restarted and rebooted 5-6 times

My pst file is large. 4.06 GB. Compression reduced its size on disk to
2.85 GB. I set up a new Personal Folders pst file and am now able to send
and receive email. However, I am not able to properly access old email,
reply to things that need replying to, can't use datebook, can't use address
book, etc.

Can anyone out there help me?

I'm in a panic. My outlook database suddenly became inaccessible, and the
error message recommended I run the Inbox repair tool. After finally finding
scanpst, I ran it (it took about 1 hour). The problem was not fixed. I got
an new error message: "Outlook.pst is in use and cannot be accessed..."

{When I could not find scanpst, I found a 3rd party product called Stelllar
Pheonix, ran the "free" download, then ran the solution, and was steamed to
find it only recovered the message headers before forcing you to buy the
product, which I did. Maddeningly, the program would not authenticate
online, forcing me through a convoluted manual registration that ultimately
required that I send a fax oversees. After I finally found scanpst, I ran
it and got the "in use" message. I then deleted Stellar and the "outlook
recovered pst" file it created during the demo version run. I plan to charge
back my Stellar purchase.]

Things I have tried since finding scanpst thus far:
renewed Norton and ran scan, no viruses or problems

-ran scanpst again, twice
-defragmented hard drive
-compressed pst file
-ran scan pst again
-latest run of scanpst said "no errors found"
-restarted and rebooted 5-6 times
-"cannot access" error still appearing

My pst file is large. 4.06 GB. Compression reduced its size on disk to
2.85 GB. I set up a new Personal Folders pst file and am now able to send
and receive email. However, I am not able to properly access old email,
reply to things that need replying to, can't use datebook, can't use address
book, etc.

Can anyone out there help me?

Rock

I get the error message "cannot open default e-mail folders. Outlook.pst is
in use and cannot be accessed. Close any application that is using this file
and try again. you may need to restart your PC."

I can't find anything that is using the .pst file although I don't really
know how to find out. Any ideas out there?

cheers,
Smudger


Not finding an answer? Try a Google search.