For how long? Outlook does some housekeeping the the PST/OST file on your computer after you close the client itself. I've seen this take more than a minute in certain rare cases.

Some Outlook users have reported experiencing the Out of memory or system resources error on Windows 11/10. Outlook crashes and closes as this error is triggered. The ...

If MS Outlook freezes or crashes when attaching files on your Windows computer, these fixes will surely help you resolve the ...

Just a couple of days ago, Microsoft confirmed that certain Office apps could crash when doing mundane tasks, such as typing or spell-checking. According to Microsoft, the bug affects Office version ...