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.
Enjoy. 
Anand, the Architect 
“Click + to add a new group, choose Existing group”
Doesn’t exist in 2016 EAC.
True!
You must use the PowerShell command “Enable-DistributionGroup” in the Exchange Management Shell.
https://docs.microsoft.com/en-us/powershell/module/exchange/enable-distributiongroup?view=exchange-ps
Are there any repercussions on permissions by changing a security group to a distro group? Such as file servers or other folders?
Are there any repercussions of doing this to file servers or permissions?
It will NOT affect since the group is still a security group.
Thank you!
works! thank you for sharing 🙂