Outlook 365 problems

Peter Serle 0 Reputation points
2026-09-01T07:24:41.4666667+00:00

Outlook (365) will not load even in safe mode. I want to back up the .pst file . Can only find Archive.pst on my PC. Were is the other one?

Peter

Outlook | Windows | Classic Outlook for Windows | For home
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  1. Zoha Fatima 345 Reputation points
    2026-09-01T10:40:48.4466667+00:00

    Hi Peter,

    If Outlook is using a Microsoft 365, Outlook.com, or Exchange account, you may not have another .pst file. Those accounts normally use an .ost file, with the mailbox itself stored on the mail server.

    Check C:\Users\<your username>\AppData\Local\Microsoft\Outlook for .ost files. Personal .pst files are commonly under Documents\Outlook Files, which is likely where your Archive.pst is located.

    If you use a POP account, there should normally be a .pst, so search Windows for *.pst before making any changes to the Outlook profile.

    Thank you, and feel free to respond back for more assistance.

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