Hi All,

Greetings for the day!!!

Today one more PowerShell script.

Background / Use Case

• For testing purpose we have created few around 5000 thousands of Microsoft 365 group in our dev tenant

• After our testing we need to clean up those group
• So we write PowerShell script to cleanup those groups and hence sharing
• We have prepared CSV file for Microsoft 365 groups which we need to remove from our dev tenant
• Following is sample CSV file

Detailed Steps

• Connect to Exchange Online using PowerShell CMDLET – Connect-ExchangeOnline

Connect-ExchangeOnline

• This CMDLET will prompt for credentials – “Sign in to your account” dialog will appear as

• Read / Import the CSV file using Import-CSV CMDLET

$m365Groups = Import-CSV -Path "C:\Prasham\Articles\PowerShell\deletinggroups\Groups.csv"

• Loop through all the groups in CSV file and remove those using the CMDLET – Remove-UnifiedGroup

$m365Groups | ForEach {
    
    #Delete the Microsoft 365 Group
    #"Group primary email" - column name in CSV file for primary email address of 
        Microsoft 365 group
    
    Remove-UnifiedGroup -Identity $m365Groups."Group primary email" -confirm:$False
}

Remove-UnifiedGroup

• This cmdlet is available only in the cloud-based service
• We can’t use this CMDLET to remove Microsoft 365 Groups if we connect using certificate based authentication (also known as CBA or app-only authentication for unattended scripts). We can use Microsoft Graph.
• Syntax

Remove-UnifiedGroup
      [-Identity] <UnifiedGroupIdParameter>
      [-Confirm]
      [-Force]
      [-WhatIf]
      [<CommonParameters>]

• Here, Identity parameter specifies Microsoft 365 group which we need to remove. We can use any value from following listing which uniquely identifies the respective group
  • Name
  • Alias
  • Distinguished name (DN)
  • Canonical DN
  • Email address
  • GUID

COMPLETE POWERSHELL SCRIPT

<#
    .SYNOPSIS
    Reads the CSV file having Microsoft 365 Groups which we need to delete 
    and removes the respective groups from our Microsoft 365 tenant
    
    .EXAMPLE
     Remove-UnifiedGroup -Identity m365group1107@knowledgejunction1.onmicrosoft.com -
     confirm:$False

    .LINK
    https://learn.microsoft.com/en-us/powershell/module/exchange/remove-unifiedgroup?
    view=exchange-ps
#>

#Check if "ExchangePowerShell" module is installed / available
if(-not (Get-Module ExchangePowerShell -ListAvailable)){
    Install-Module ExchangePowerShell -Scope CurrentUser -Force
    }

#import the CSV file
$m365Groups = Import-CSV -Path "C:\Prasham\Articles\PowerShell\deletinggroups\Groups.csv"

#Connect to Exchange Online
Connect-ExchangeOnline

#Example - 
#Remove-UnifiedGroup -Identity m365group1107@knowledgejunction1.onmicrosoft.com -confirm:$False

$m365Groups | ForEach {
    #Delete the Microsoft 365 Group
    #"Group name" - column name in CSV file for group name of 
      Microsoft 365 group
    
    #$m365Groups."Group name"
    
    #get the group name 
    $groupName = $_."Group name"

    #remove
    Remove-UnifiedGroup -Identity $groupName -confirm:$False
}

#Disconnect Exchange Online
Disconnect-ExchangeOnline -Confirm:$False

REFERENCES

• Remove-UnifiedGroup
• Connect-ExchangeOnline

Thanks for reading the article !!! Please feel free to discuss in case any issues / suggestions / thoughts / questions !!!

HAVE A GREAT TIME AHEAD !!! LIFE IS BEAUTIFUL 🙂