Did you ever get confirmation if only the two listed releases are affected? It seems like they would put all 14.x releases if they were all affected. We're moving to 14.2.1 soon so hoping this is resolved in that release.
We had a similar situation where we had migrated all users off of a 2013 DAG to a 2019 DAG and when we retired the 2013 DAG unity stopped working with mostly 503 errors. Turns out the fix was to add a mailbox to the unity service account as its requ...
Same issue here. I see its sort of fixed in 12.1 (suppressed) and I've subscribed to the bug in case they update it to note the updated infrastructure has been added.
