We've had a but of a torrid time in the last week where users are logging into our Cloud edition of Dynamics 365 Finance 10.0.10; they then try to invoke the option to create a journal entry, and try to open Excel. Despite logging in to D365 Finance using MFA, the Excel Connector consistently fails its usual silent MFA test as it fires up. If you scroll down the error message to logout, do the same process, you're prompted for your account, password and MFA credentials, and then it works. For a day. Then the whole experience occurs again the next day.
We did notice that Microsoft renewed our server and SSO certs on May 23rd. This has been the first week since then when our accountants are putting in their last period adjustments. We've also upgraded all our user client machines from Office 365 A3 to Microsoft 365 A5 last month. The effect is across Chrome, Edge and IE. We did have an earlier bout of random 500 errors on Chrome only, but emptying browser history cured that.
We have noticed that scheduled jobs we queue at midday fire up at 11am instead, so it looks like parts of our server config is running GMT when the rest of us are on British Summer Time. That apart, we can't understand why this keeps happening. Clearing browser history doesn't help, and i'm not sure if there's any way of just removing (expired) cookies used by the SSO authentication process without throwing out the kitchen sink.
Any clues on what we can look for to cure this?
