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What to do about an out-of-date .ost file?
I'm upgrading the SSD in my laptop, so I cloned the old one onto a bigger one and swapped them. Windows (finally) boots fine, with all my apps intact. When I launch Outlook however, it tells me it'...
Just delete the ost file as recommended then restart Outlook. It will rebuild an up to date ost very quickly.
The ost file shouuld be in folder "C:\Users\<username>\AppData\Local\Microsoft\Outlook\" unless you have moved it.
>> A search for all the .ost files on my PC yields 41 matches.
The ost name is alias@domain format at C:\Users\%username%\AppData\Local\Microsoft\Outlook\ - if you have multiple ost files with the same name and a number following the name, delete all.
You do not need to delete the account and add it back (you could, but need to set up signatures again), just close outlook, delete the ost files and restart outlook.
