So I have my documents folder in my OneDrive that's constantly being synced, the problem is, since the Outlook PST file is in that documents folder and is being synced, sometimes when I try to open Outlook, it gives me an error that the PST file is in use. I tried to exclude that file from being synced in OneDrive but it gave me a warning if I stop syncing it, the file will be deleted on my local PC so I canceled that and reenabled syncing for that Outlook folder in the documents so how to get around this? I want my PST file to be synced/backed up but I'm getting tired of this error not being able to launch Outlook sometimes.
My one drive only syncs when there are changes so one in the 2 weeks when I upload stuff to my onedrive. In your case it will start to sync as you open outlook I guess. Personaly I use imap so I don't have that problem.