Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
I’m having the same issue on my iPhone 10. I was using the outlook app for mail but have deleted it and using the browser version but still fetting the error, probably because i use outlook as my primary contacts and have other office365 apps installed.
I’m guessing it has to do with the two recent iOs updates that i’ve installed since that seems to correlate with the timing of the error messages starting. Alrhiugh i was having trouble with Outlook mail not receiving mail on my Surface Pro 7 last week using the browser version so it could be a server level issue with Microsoft.
Whatever it is, it sucks and affects productivity dramatically.