1. create a distribution group
2. put all required users in the distribution group
3. forward mailbox to the distribution group
done
OctInv
I think the above solutions will work, but I think a neater and easier way to achieve this is to use Transport rules to forward the relevant messages to other recipients.
Akhater
no offense OctInv but transport rule is a very bad idea in this case.
You are generating a process that is going to be applied on each and every email that is passing by your server (and thus causing delay and load) when you can create it direct at the recipient side and make it fire just when needed
1. create a distribution group
2. put all required users in the distribution group
3. forward mailbox to the distribution group
done