Get-MgGroupMemberCount

What is Get-MgGroupMemberCount?

The Get-MgGroupMemberCount cmdlet retrieves the total number of members in a specific Microsoft 365 group. It’s part of the Microsoft Graph PowerShell module and provides administrators with an easy way to audit group membership size without needing to retrieve full member details.

Why Use Get-MgGroupMemberCount?

This cmdlet is ideal for reporting and automation. Administrators often use it to:

• Monitor the membership size of Microsoft 365 groups.
• Identify oversized or underused groups.
• Automate group governance and reporting workflows.
• Integrate membership metrics into scripts for security and compliance checks.

When managing large tenants, this command helps streamline the process of auditing membership distribution across multiple groups.

Prerequisites

Before running this cmdlet, install the Microsoft Graph module and connect with the required permissions:

Install-Module Microsoft.Graph -Scope CurrentUser
Connect-MgGraph -Scopes "Group.Read.All"

How to Use Get-MgGroupMemberCount?

Use the -GroupId parameter to specify the Microsoft 365 group you want to count members for. Include the -ConsistencyLevel Eventual parameter to ensure accurate results across large datasets.

Get-MgGroupMemberCount -GroupId  <String> -ConsistencyLevel Eventual

Get-MgGroupMemberCount Examples

Example 1: Retrieve the Total Member Count for a Specific Group

This command retrieves the total number of members in the specified group.

Get-MgGroupMemberCount -GroupId "12345-abcd-6789-efgh" -ConsistencyLevel Eventual

This example is useful for quick reporting or verifying that group membership aligns with expected limits.

Summary

Key Point	Details
Cmdlet Name	Get-MgGroupMemberCount
Purpose	Retrieves the total number of members in a Microsoft 365 group
Required Scope	Group.Read.All
Primary Parameter	GroupId, ConsistencyLevel
Automation Benefit	Helps monitor and report group membership efficiently
Use Case	Useful for group audits, reporting, and governance automation