Announcing General Availability of the Exchange Online PowerShell v2 Cmdlets

We have been updating OWA signatures using Set-MailboxMessageConfiguration for the past 6+ months. Suddenly, and with no change on our part, Set-MailboxMessageConfiguration has started to have no effect. Our business heavily depends on this cmdlet and we would really appreciate your feedback/guidance. Someone else posted the same issue on SO here: https://stackoverflow.com/q/69764573/152630.

Example (that previously worked):

Set-MailboxMessageConfiguration -Identity "joe@domain.com" -SignatureHTML "My new sig" -AutoAddSignature $True -AutoAddSignatureOnReply $True

Interestingly, after manually running Set-MailboxMessageConfiguration in a local PowerShell, we see the correct result in Get-MailboxMessageConfiguration (https://www.screencast.com/t/X9i4BY1jSb) but NOT in the OWA UI. Please advise.