When a message is send a message to a typical moderated distribution list, the moderator gets the familiar Approve / Reject buttons and this works for the test group I setup as part of a "your decision is requested" e-mail. This message comes from "Microsoft Exchange on behalf of ". This e-mail cannot be forwarded until a decision is made.
However when I enabled moderation on all other groups, the moderator gets the "your decision is requested" e-mail but it doesn't contain the approve / reject group even though they are also both the moderator and the owner of the group. This message comes from "Microsoft Exchange Approval Assistant on behalf of ". This e-mail can be forwarded.
According to the message headers the failing group is
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem and the working group is
That said using the exchange management console I can run
get-distributiongroup on both groups with no visible relevant differences. Both groups show in ECP and office 365 portal.
Is it just the case that I mail enabled the security group today and the whole environment hasn't caught up, or how do I diagnose the issue further?