vlw007

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ExchangeImpersonation SOAP header must not exist for this type of OAuth token.

We are still having this issue: _Can't connect to the mailbox of user Mailbox database guid: f22f50f7-01b4-4b6a-a477-82414f55a9dd because the ExchangePrincipal object contains outdated information. The mailbox may have been moved...

While enumerating Public Folders: Unable to cast object of type 'Microsoft.Exchange.Data.Storage.PublicFolderSession' to type 'Microsoft.Exchange.Data.Storage.IMailboxSession'.

Thank you @schmicwork and @CodeMan1000 -- we are starting to see this problem clear for a few tenants. Hopefully you will see this resolution as well.

While enumerating Public Folders: Unable to cast object of type 'Microsoft.Exchange.Data.Storage.PublicFolderSession' to type 'Microsoft.Exchange.Data.Storage.IMailboxSession'.

Now we are seeing this problem with tenants in Australia and New Zealand.