Deleted OST file for Outlook 2019, Outlook won't open

Occasional Visitor

Hi, how do I fix this issue: I accidentally deleted my corrupted .ost/OST data file for Outlook 2019.  When I tried to reopen Outlook:

"Cannot start Microsoft Outlook.  Cannot open the Outlook window.  The set of folders cannot be opened.  Errors have been detected in the file C:\Users\Smart\AppData\Local\Microsoft\Outlook\XXXX - XXX.ost."

(XX -  for my privacy) My platform is Win10.



2 Replies

Hi @DaueMad83 

Try to start Outlook in safemode
win + R
outlook.exe /SAFE


Best regards Schnittlauch

One option besides starting Outlook in SafeMode could be to create a new Outlook profile. You can create a new Outlook profile by going to "Control Panel" > Mail > "Show Profiles", "Remove" the profile and click Apply. Now when you next start Outlook it will create a new profile for you.