Use AD security group as o365 distribution group

[Cade Michaels]

O365 question.

We have our on premise Active Directory setup to Sync with O365. In active directory I have a security group named "Quickbooks Users" which gives those users access to the quickbooks files. I would like to setup a distribution group that is dynamic to the security group so I do not have to maintain 2 different groups. Any suggestions on the best way to accomplish this? I don't even see AD security groups in Exchange to convert them to Mail Enabled security groups and I do not see a way to create a dynamic group based on another group.

[#2]

Try this:
Use the Enable-DistributionGroup cmdlet to mail-enable existing universal security groups and universal distribution groups that aren't already mail-enabled.
ref: https://docs.microsoft.com/en-us/powershell/module/exchange/users-and-groups/enable-distributiongrou...
The Command would be: Enable-DistributionGroup -Identity "Your Security Group"
Once you sync this group I would assume that it would be a Mail enabled security group in Office 365. This would thus dynamically change based on what you do OnPrem, and could also be used to send emails to.

[#3]

I've found that just adding an email address to a security group in on-prem AD changes the group to an email-enabled security group in O365. This should work if you don't already have an O365 distribution list with the same email address.

I haven't been game to try and convert existing O365 distribution lists to mail-enabled security groups in AD yet. I'm sure it's as easy as deleting the O365 group and adding the email address to the AD security group.

[#4 · Accepted solution]

Yeah, this should be correct! Mail anable the groups and sync! Make sure the mail attribute and proxyaddresses is populated with the mail address

Adam

[#5]

@adam deltinger Confirmed this does work. simplest way to resolve without messing around with PS Scripts.

[#6]

@Daniel Pipe do you know the PowerShell command to add an email address to a security group ? 

the trouble is 

are you sure it becomes a mail-enabled security group ? 

AD on-prem 

Exchange Online full 

[#7]

@Cade Michaels 

How about setting up a dynamic group in Microsoft 365 to automatically add those security group?

[#8]

@Kidd_Ip no, this is not the request.