I am having trouble getting Send As permissions in Exchange 2007. I have a shared mailbox that a dozen people need to have permissions to send on its behalf. I have addedd full access permissions so i can attach the mailbox to their client (outlook) with no problems. Then add the same group to the send as permissions again with no problems. 1 hour later the send as permissions are gone??? So i figured it might be a problem with "duping" the group in both full and send as, so i have tried to add the users individually to the send as, still with no luck??