What is a .ost file

One such common issue is getting OST file error messages. These messages do not just hamper the work, but they may also lead to permanent data loss if not corrected properly. You might encounter this error message while trying to open the OST file. It severely restricts opening your OST file and, to resolve this error, you first need to understand the cause of the error.

Now that you know the possible causes instead of panicking find out the solutions to overcome this error. Method 1 — Close the MS Outlook application. Please let us know if you are aware of a different kind of. OST file. These apps are known to open certain types of OST files. Remember, different programs may use OST files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Not sure exactly what type of file you are trying to open? Try our new File Analyzer. It is a free tool that can identify more than 11, different kinds of files - most likely yours too!

It will help you find software that can handle your specific type of file. Download File Analyzer here. Most data remains on the server; however, any items that are saved locally should be backed up. For example, Calendar, Contacts, Tasks, and any folders marked Local only. Create an Outlook Data File. Need more help? Join the discussion. Was this information helpful? Yes No. Thank you!

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