How To Get Rid Of Error Messages In Outlook

For someone who is a regular Outlook user, when he tries to access the Outlook installed in his system, an error message saying, ”Cannot open your default email folders. The file xxxx.OST is not an offline folder file” may appear on screen. The presence of this error message maybe due to two reasons,

  • Corruptions/problems with the .OST files on the system may be one of the reasons why the error message shows up.
  • Another reason is that if the Microsoft Exchange mailbox cannot be accessed by Outlook, the error message may appear on screen.

Sometimes in Outlook, you may not have set the correct settings for the Exchange mailbox in order for Outlook to access it. The email account or the Exchange mailbox for the Exchange mailbox in the Exchange server may be deleted or removed. Also, between the Exchange server and the Outlook, communication difficulties may be present. To fix the ‘cannot start Outlook’ problem, the below provided guidelines need to be followed.


  • The OST file that is the root of all problems should be searched and found. The OST file can be found by making use of the Search function in Windows.
  • The offline information in the OST file needs to be saved. The offline data contains large amounts of important information. In order for the OST files to be scanned, the Advanced Exchange Recovery must be availed. The data can be saved with ease and all the items and messages can be used with Outlook by saving the data into an Outlook PST file.
  • The OST file needs to be backed up.
  • The actual OST file should be deleted or renamed.
  • Now the error needs to be fixed.
  • Keeping a very effective antivirus program in your system that is up to date is very essential. Viruses also may cause damages to the files and virus intrusions in the system from the internet and other sources can be prevented by making use of an antivirus program.

By following the above-mentioned guidelines to fix the ‘cannot start Outlook’ error, you can easily fix the problem with the OST file and the error message will no longer occur and you have the freedom to continue working with Outlook. If the guidelines cannot be understood properly, you can make use of the services of our customer support center. 
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