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I have no idea what any of that means.
I've 'reverted' to Outlook 16.88. Actually it's an 'advance' on what I was using!
However it so not-an-advance that I decided to revert to what I had previously been using successfully. Howver MS doesn't recognise my authentication (yet again!) and I've had to go through a lengthy 'new password' process that's like being interrogated by the police. And then it says, 'It may take up to 24 hours to confirm your authentication.'
So here I am, out of comms again, being led by the nose by automated systems. I only want access to what I have been running for years!
How old is the version of Outlook that you have reverted to?
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38021