Using classic Outlook for Windows in business environments
Thank you for your attention to this issue, and in particular for the follow-up to keep people posted, rays of light amidst a storm of obfuscation.
FWIW, in MS Office 2021 Pro Outlook on Windows 10 Pro and Fair Email on android, which both experienced rapidly but variably repeated password requests for each of multiple accounts in the profiles since the start of this issue, are now both performing as expected.
Thanks again.