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Save email to .pst instead of .ost in Outlook 2010

Posted on 2015-01-27
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Last Modified: 2015-04-17
We are getting ready to migrate some email users to Office 365 from a 3rd party email host.  They use outlook 2010 to access their email.  I know how to export to a .pst file, however he wants me to configure the users to automatically start saving to a .pst file so that way it is ready to import when we make the change over.  How do I do this?  I know that Outlook saves to a .ost file normally, not sure how to make it keep a updated .pst file automatically.
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Question by:icecom4
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Expert Comment

by:David Johnson, CD, MVP
ID: 40574571
not needed as O365 can do an exchange to exchange import
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Expert Comment

by:Qlemo
ID: 40574665
A .OST is a cashed Exchange mailbox file. If you need to have a .PST file, you can only perform a move or copy, or convert the file with other 3rd-party software (free or payed). What "he" wants to do is not possible.
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Expert Comment

by:Hello World
ID: 40574768
Hi,

Normally, Outlook will use .ost to save database when you configure IMAP or Exchange account.
If you want to use .pst file, we can recreate outlook profile and change the data path, for your reference:
http://support.microsoft.com/kb/2752583/en-us
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by:gheist
ID: 40576095
OST and PST is same file format.
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Expert Comment

by:dsnegi_25dec
ID: 40576465
Can you try outlook rule,  whatever will come for outlook that will copy into pst folder as well
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icecom4 earned 0 total points
ID: 40720052
I found that to save as a .pst instead of a .ost, configure outlook as POP3 instead of imap.  The .pst file can be attached or imported to any outlook email account, however the .ost cannot.
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Author Closing Comment

by:icecom4
ID: 40729298
the answer explains that .pst and .ost are not the same thing, and what configuration downloads to a .pst file vs a .ost file
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Expert Comment

by:gheist
ID: 40729418
OST is unicode PST renamed.
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Author Comment

by:icecom4
ID: 40730069
sure, but an ost file cannot be easily imported into outlook, without the help of 3rd party utilities, which sets it apart from a .pst file greatly.
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