mail enabled security group

Question

Hi All

I am using exchange 2016 Hybrid environment. i have a mail enabled security group in onprem. i have added two AD security groups to this mail enabled security group. when i send email to mail enabled security group, user who are members of AD group residing in mail enabled security group are not getting emails. is this expected behavior.

Answer 1

Security groups are not valid mail recipients, so yes, that's expected behavior.

Answer 2

Hi @Glenn Maxwell ,

when i send email to mail enabled security group, user who are members of AD group residing in mail enabled security group are not getting emails. is this expected behavior.

Yes, it's the expected behavior.

As mentioned in this official article, security groups are mainly designed for assigning permissions to shared resources, if you want the group members to receive mails sent to the group, you'll need to create the security group as an email entity, in other words, a mail-enabled security group.

In current situation, if you want it to work, you can consider mail enabling the two AD security groups using the steps below:

1. Go to ADUC (Active Directory Users and Computers), convert the AD security groups to Universal (it's probably a Global at present).
   
2. Run the command below in Exchange Management Shell to mail enabled the groups:

Enable-DistributionGroup -Identity <ADGroupIdentity>

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