Mac Errror Code 1025

I'm hoping someone might have a clever idea about a recurring Outlook error code that I keep getting when I use Outlook (as in the MS office suite) on my iMac. Funnily enough, I never get this issue when using Outlook on my PC laptop.

The Mac error code is 1025. Apparently you get this message when updating Outlook or a related application, or when you try and change the visibility of IMAP folders (whatever that means). My iMac has been updated several times of course and Outlook occasionally but there doesn't seem

to be an immediate Outlook update due. For ages, I never had this problem on the Mac but now I get it often. The only cure seemingly is to delete the affected email account (it randomly seems to affect either of my two designated email accounts email account) and then recreate the relevant email account again in Outlook. This works for a bit and then, bang, it happens again. Do you know of any way to resolve this very annoying problem?

Any thoughts would be most welcome!