Identifying Duplicate Microsoft 365 Group Names

Summary

It is possible to create M365 Groups and Teams with the same name, and there is currently no built-in way to prevent this. Having duplicate names can cause confusion and increase security, governance and compliance risks.

Prerequisites

• PnP PowerShell https://pnp.github.io/powershell/
• The user account that runs the script must have Global Admin administrator access or Entra ID Admin role.

• PnP PowerShell

param (
    [Parameter(Mandatory = $true)]
    [string] $domain
)

Clear-Host
$dateTime = (Get-Date).toString("dd-MM-yyyy-hh-ss")
$invocation = (Get-Variable MyInvocation).Value
$directorypath = (Split-Path $invocation.MyCommand.Path) + "\"
$exportFilePath = Join-Path -Path $directorypath -ChildPath $([string]::Concat($domain,"-duplicateM365_",$dateTime,".csv"));

$adminSiteURL = "https://$domain-Admin.SharePoint.com"
Connect-PnPOnline -Url $adminSiteURL

# Retrieve all M365 groups
$groups = get-PnPMicrosoft365Group

# Find duplicate group names
$duplicateGroups = $groups | Group-Object DisplayName | Where-Object { $_.Count -gt 1 }

# Create a report
$report = @()
foreach ($group in $duplicateGroups) {
    foreach ($item in $group.Group) {
        $report += [PSCustomObject]@{
            DisplayName = $item.DisplayName
            GroupId     = $item.Id
            Mail        = $item.Mail
        }
    }
}

# Export the report to a CSV file
$report | Export-Csv -Path $exportFilePath -NoTypeInformation
Disconnect-PnPOnline

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Source Credit

Sample first appeared on Identifying Duplicate Microsoft 365 Group Names

Contributors

Author(s)
Reshmee Auckloo

Disclaimer

THESE SAMPLES ARE PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.