Ok, after many hours of digging and searching I finally found a solution:Īpparently this is a known bug with no official patches from Microsoft. Office-exchange-server-administration office-exchange-server-mailflow Here is a cleaned up version of relevant lines: Looking into MSGTRK logs, I found out that problem is with group expansion ( distribution list expanded'): Exchange resolves to all members except from poorguy, like he doesn’t exist.
I've tried to delete, re-create a new group adding poorguy as the only member, nothing happens (messages just get dropped with no recipient, no NDR) Nothing appears to be different from other users, except from an additional x500 address that comes from a previous migration. There are no particular policies/restrictions for poorguy. He can send and receive all messages directly from/to his mailbox with no issues. Poorguy has SMTP: and SMTP: in proxyAddresses attribute.
I created a new group “test” with address added some members, but one of them (and only that one, let’s call him “ poorguy”) is not receiving emails.Īll groups/distribution lists work correctly, for all other mail recipients, except for poorguy. Hello all, I’m having a really weird problem with a distribution group in our Exchange 2016 (CU 10 build 1531.3).
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