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How do convert ost to pst

Have a user with an old OST on their machine.  They claim to be missing some emails after auto-archive was switched on.  They appear to have deleted the archive files from their local drive.  I would like to take the older OST file i found and convert to PST to compare with the historical information from one of the archives.
Is there a Microsoft path to doing so, or do i need to spend the $300 on a 3rd party application?
Thanks in advance for any thoughts.
1 Solution
There is no inbuilt functionality, however there are third party tools available ( at a cost) to do this. there are plenty available if you do a google search
Robert1cAuthor Commented:
Thanks for the response. I had a feeling this was the case since there id no reference to this process with the Microsoft site that I could find. I  wanted verification, so will look to 3rd part.
Hello Robert1c,

If the OST file is from an earlier version of Outlook, you can use this free tool - ost2pst.exe.

OST to PST Online Converter is a less expensive alternative to separate program

OST Viewer is another low cost solution

Recovery Toolbox for OST to PST conversion

Hope this helps!
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