Configuring preferences and options in Outlook.com
I have the same issue with daily Microsoft emails asking to "Please update your credentials" for a sync'd email account that was recently upgraded to a new server by the ISP (mypostoffice.co.uk).
I cannot access the Sync Email options at outlook.com to either remove the account or sync the account as describe on the multiple posts here.
Im trying to support my 86 year old mother who in this situation, and I have to say microsoft is causing her great distress with the daily messages advising to resync an account , with microsoft having removed the tools to so so.
As a paid up microsoft 365 customer, this is a totally unacceptable situation.
Simon Andrews
PS please note the daily email , currently being sent from Microsoft outlook, specifically advises to use the tools that are no longer working. As copied here: