Outlook 2016 with Exchange/Domains

I'm not sure if a recent update to Outlook 2016 (I subscribe to Office 365) introduced this or not...

Recently, I'm frequently prompted for my password for an email where I'm an independent contractor.

If I set the account up as new, it goes through fine. Periodically while the laptop (Windows 10) and Outlook are on, all of my devices will start requesting me to enter a password and they go offline. The Exchange server, which uses a domain ("ps") will lock me out for a few hours.

If my laptop is shut down or Outlook is not running, this does not occur. Another Exchange account does not have the same problem.

Has anyone else had problems with this? Is there a special setting I need to enable two Exchange accounts?

I think I may have figured it out. The Windows Mail client was configured for the Exchange account and likely had an outdated password. I deleted the account from Mail and hope this will resolve the issue.

I experienced a similar issue with Office/Outlook 2016,
Now I use T-Bird, does the job, however I still prefer Outlook, especially in a work/production environment.
So problem resolved?
I'm getting that I want office back feeling, .......