Solution to Fix "default outlook profile.ost is in use and cannot be accessed" Error

 

Reason for 'default outlook profile.ost is in use and cannot be accessed' error to occur is when multiple users or applications are trying to access the same OST file.
Some of the common reasons for such queries:

Slow internet connection

Error while data synchronizing to .ost file on the local machine with the Microsoft Exchange server

Accessing the same ost file by multiple users at the same time

Runtime conflict of certain other programs with the Outlook application

 

[Solved] - "default outlook profile.ost is in use and cannot be accessed":

 

Close Outlook and Kill all the Outlook related Processes

Steps to perform the task:

  1. Close your Microsoft Outlook safely.
  2. Right click the task bar and select the "Start Task Manager"
  3. Choose the "Processes" tab.
  4. Look for "Communicator", "Lync", "ucmapi" or "Outlook". If you find, right-click and click the "End Process" button.

 

Turn off Cached Exchange Mode

  1. Close your Microsoft Outlook
  2. Go to "Control Panel", Search for "Mail" and click the "Mail".
  3. Click the "E-mail Accounts..." button and choose the "Email" tab.
  4. Click the Exchange account, and then click Change.
  5. Under Offline Settings, Uncheck the "Use Cached Exchange Mode" >> Select "Next" >> "Finish".
  6. Exit, and then restart Outlook.

 

ScanOST.exe file is not available after outlook 2010

In case that your offline Outlook Data File (.ost) has local data that is not present on the server, we recommend that you export the data to an Outlook Data File (.pst), and then you delete your offline Outlook Data File (.ost). After the data is downloaded from the Exchange server, you can import the Outlook Data File (.pst) into the new offline Outlook Data File (.ost). During the import, you can exclude any duplicate data from the Outlook Data File (.pst).

To import the Outlook Data File (.pst) into the new offline Outlook Data File (.ost), follow these steps:

  1. In Outlook Click the File tab, click Open, and then click Import.
  2. Select Import from another program or file, and then click Next.
  3. Select Outlook data file (.pst), and then click Next.
  4. Click Browse, and then locate the PST file that you exported.
  5. Select Do not import duplicates, and then click Next.
  6. Under Select destination folder, click a folder to which you want to import the information, and then click Next.
  7. Click Finish.

 

Other Errors of OST files

  1. .ost file in use error outlook 2010, 2007, 2003
  2. Outlook 2010 ost file in use and cannot be accessed
  3. OST file is in use by another application
  4. Cannot display the folder the file outlook ost is in use and cannot be accessed
  5. Default outlook profile.ost is in use and cannot be accessed


Still if you are facing the issues, try our EdbMails OST Recovery Tool to repair the .OST file