Say you have a AD Security Group, you want to convert to a distribution group. (When do we stop calling Distribution List…I always said DL. Now it’s distribution group..whatever!!)
It’s a very easy task. There is only one requirement.
Security group must be a Universal Group.
if it is not a universal group already, go ahead change in Active Directory (Uses and Computers console).
Open Exchange Admin (Power)Shell and type this:
Enable-DistributionGroup -Identity “Your Security Group Name”
That’s it. You are done. To verify open ADUC and check the group type. It should gained a email address and it will show up in Exchange Admin Center in Groups.
If you really really want to od in a GUI instead of PowerShell, follow the instructions below.
1. Open Exchange Admin Center
2. Go to Recipients ==> Groups
3. Click + to add a new group, choose Existing group
4. Select your AD Security Group and follow the wizard.