In Azure AD/Office 365, it is difficult to establish the groups a Mail Contact is a member of.
This is the PowerShell command I use to find out…
$strContact = Get-MailContact -Identity "steve.tester99@stakeford.com" $strContactDN = $strContact.DistinguishedName $ContactFilter="Members -like ""$strContactDN""" Get-DistributionGroup -Filter $ContactFilter -ResultSize Unlimited | select DisplayName | sort DisplayName
Replace -Identity “steve.tester99@stakeford.com” with the Mail Contact’s email address.