To allow distribution group owners to manage distribution groups from the Exchange Control Panel and remove the ability to add and/or remove distribution groups, a custom role is required to be created and assigned to the Default User Assignment Role.
1) Open Exchange Management Console.
2) Create the management role named ‘OwnerDistributionGroups’ and assign it as a child role by using the following cmdlets;
New-ManagementRole -Name OwnerDistributionGroups -Parent MyDistributionGroups
3) Remove the ability to add or remove distribution groups from the custom role by using the following cmdlets;
Remove-ManagementRoleEntry OwnerDistributionGroups\New-DistributionGroup -Confirm:$false
Remove-ManagementRoleEntry OwnerDistributionGroups\Remove-DistributionGroup -Confirm:$false
4) Assign the custom role ‘OwnerDistributionGroups’ to the user role ‘Default Role Assignment Policy’ by using the following cmdlet;
New-ManagementRoleAssignment -Role OwnerDistributionGroups -Policy “Default Role Assignment Policy”