Copy Members from Distribution Group to Office 365 Group in PowerShell

In this post, I am going to write powershell script to add users into Office 365 group by importing members from distribution list. We can use the Exchange powershell cmdlet Get-DistributionGroupMember to get members from distribution group and use the command Add-UnifiedGroupLinks to add user as a member into existing Unified group.

Before proceed run the following command to connect Exchange Online powershell module.

$365Logon = Get-Credential
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $365Logon -Authentication Basic -AllowRedirection
Import-PSSession $Session

The below powershell command retrieves members from a given distribution group.

Get-DistributionGroupMember -Identity "YourDG" -ResultSize Unlimited

Use the below command to add users into an existing Office 365 group.

Add-UnifiedGroupLinks –Identity "O365Group" –LinkType Members  –Links [email protected]

Copy members from distribution list to Office 365 group:

#Source - Provide distribution group
$DistGroup = "TestDG"
#Target - Provide office 365 group
$O365Group = "TestO365Group"
$DG_members = Get-DistributionGroupMember -Identity $DistGroup -ResultSize Unlimited
$totalMembers = $DG_members.Count
$i = 1 
$DG_members | ForEach-Object {
Write-Progress -activity "Processing $_" -status "$i out of $totalMembers members added"
Add-UnifiedGroupLinks –Identity $O365Group –LinkType Members  –Links $_.PrimarySmtpAddress
$i++
}