Re: Adding a MailContact to a DistributionGroup - Email and calendar - Office 365

I thought this was simple, but I cant figure out how to accomplish it in the UI or Powershell. When attempting in Powershell, I get the following:

<paste>

PS C:\Users\tybala> Add-DistributionGroupMember -Identity "Board" -Member "XXXX@gmail.com"
Couldn't find object "XXXX@gmail.com". Please make sure that it was spelled correctly or specify a
different object.
    + CategoryInfo          : NotSpecified: (0:Int32) [Add-DistributionGroupMember], ManagementObjectNotFoun
   dException
    + FullyQualifiedErrorId : A9657AC1,Microsoft.Exchange.Management.RecipientTasks.AddDistributionGroupMemb
   er
    + PSComputerName        : pod51018psh.outlook.com

</paste>

Well, the MailContact exists.. maybe it should be enabled? It seems that Enable-MailContact does not exist when I try to run it.

Please let me know what I need to do in order to get this working.

Hello TyB,

Before adding an external user to a distribution group of Office 365, make sure you have added it as an external contact, as Kelsey mentioned above.
For your reference:
Create a New External Contact

Then, you can choose either one the ways to add the external user to a specific distribution group:
•In the Exchange Control Panel, just as Kelsey suggested:
1) Select Manage My Organization > Users & Groups > Distribution Groups.
2) Click the specific distribution group >Membership >Add > click the external user to add it.
•Run Windows PowerShell, just as you have mentioned:
Add-DistributionGroupMember -Identity "Staff" -Member "JohnEvans@contoso.com"

Additional reference:
Distribution group limits

Thanks,
Cherry Wang