"Exchange password required"
I have a client who is getting a persistent nag from macOS that their "Exchange password required".
No matter how many times these are re-entered, the account is removed and re-added, the keychain entries related to this password are deleted and tried again, it always comes back. Sometimes it takes a few hours, sometimes a few days, once it was a couple of weeks, but it always returns.
Microsoft has gone as far as to tell me to turn off MFA, and Modern Authentication, but that is a security risk that I do not feel comfortable taking (as it could mean leaving it off for over a week to determine if the issue is being caused there). A point of clarification, though, because there seems to be some crossed wires in every thread I read about this: The request for credentials is coming from Internet Accounts in macOS System Preferences. It is not being called from the native mail app, or Outlook (which they do use for email). Essentially, the only thing they need them there for is to enable them to use iCal for their calendars for the affected accounts.
Has anyone seen this, have any suggestions or otherwise advice to give me in this situation? I did search for this issue and I cannot find a single thread that has a good answer on just about any site.
Thanks!
MacBook Pro