how to convert security group in active directory to mail enabled distribution group for exchange server

we have local active directory set up with 2500 users and 35 security groups . we deployed new exchange server 2016  .
can i convert this security groups to mail enabled distribution group..??
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IvanSystem EngineerCommented:

if you want to send email to those users, you can create Mail enabled Security Groups.
 Go to EMC --> Recipients --> Groups and then choose either to create Mail enabled Security Groups.

harisaboobakerAuthor Commented:
we already have around 35 security groups created from active directory i think this groups are not mail enabled. existing users are member of this group  .

 can i convert this group to mail enabled distribution group or mail enabled security group.

Because when we create new distribution group ,again we have to add member user to this group .this is difficult
IvanSystem EngineerCommented:

I have just realized that direct conversion was available in 2010, but not in 2013/16, for Global security groups.

If you have Universal security groups, then YES, you can convert them to mail enabled security group. This group will still provide access to resources (if it was used for that purpose) and it will also be used to send email to users in that group.

To do so, from Exchange Shell run command:
Enable-DistributionGroup -Identity "Name_of_Group"

IvanSystem EngineerCommented:
PS: Make sure that you configure Manager for group, so that you can delete it, if needed.
To do so, from Active Directory Users and Groups, go to Properties of that group --> Manager by, and enter user.
If you don't have that parameter, then you wont be able to remove day.


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