Licensing upgrade from O365 E3 to E5 - meeting notifications resent

New Contributor

Hello all,

We have noticed new behavior when we upgrade users from 365 E3 to E5, whereby old meeting notifications that have been sent in the past (new meeting, new recurring instance, update to a meeting etc) get re-sent post upgrade, causing mass confusion. When we examine the meeting requests we see that they have been re-stamped with the new(er) audio-conferencing features/telephony details, which in the past seemed to occur silently. Now it appears past notifications get resent, almost like a meeting migration tool has been run which has regenerated them all. This has only started happening in recentweeks, previously we have upgraded 1000s of other users with no issue. I can't get a straight answer from MS support and our account managers advise this is not expected. Has anyone else noticed this?
cheers Kellee

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