We have a group called AB. This is an Exchange group with a select number of people in the group. As the administrator, I can open Outlook, display the FROM area of the email and send to someone from the AB@domain.com email. However, others receive an error from the server stating "You do not have permission to send to this recipient. For assistance, contact your system administrator." The user states she was able to do this on the old exchange server (recently migrated from a different domain), but in the new domain, she cannot. The old server is online and I have access to view all exchange and AD information. I have compared the AD account and group to be exactly the same, yet she still cannot send from the AB@domain.com email. What would you suggest?