If you want to allow a user to ‘Send-as’ a Universal Distribution Group, you cannot do this by right clicking the Distribution Group in Exchange and managing send-as permissions as you would with a shared mailbox or user mailbox.
However, the following will allow you to carry this task using Active Directory instead of from within Exchange:
- Open Active Directory Users & Computers
- Activate Advanced Features in the View menu
- Find the distribution list you want to send as
- Open the properties and go to the Security tab
- Add the user or group in question
- Check the Send As permission
This should now give the end user permissions to send as a Distribution Group.
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