Forum Discussion
Transport Rule and Mail-enabled Security Group: Delayed Evaluation of Group Members
I have the following transport rule: If the message:
Is sent to a member of group 'group-name@domain'
Take the following actions:
Redirect the message to 'shared-mailbox@domain'
and Stop ...
Hi, this is a known behavior in Exchange. Transport rules cache group memberships for performance, so changes can take around 4 hours to update. Unfortunately, there isn’t a supported way to force an immediate refresh. One alternative is to consider using dynamic distribution groups if you need real-time updates.
