When attempting to manage an Active Directory distribution group, review the group’s policies and configuration to ensure that there are sufficient privileges and resources to carry out the desired tasks. Here are some steps to start troubleshooting:

1. Check that the user account has the permissions
   necessary to edit the distribution group.


2. Verify that the user is an administrator for any
   supporting applications (e.g. Exchange).


3. Ensure that the group is set up to accept membership
   requests.


4. Check to see if any dependencies or other restrictions
   are being applied to the group.


5. Review the group membership limits for the domain
   and the group.