Get all the assigned owners of an Office 365 Groups group, also getting the owners in a Teams team. The script connects to Exchange Online to get the information.

GetGroupOwners.ps1

param (
    [string]$GroupName,
    $Credentials
)


if ($Credentials -eq $null)
{
    $Credentials = Get-Credential
}
 
Write-Host "Connecting to Exchange Online"
 
$exchangeSession = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $Credentials -Authentication Basic -AllowRedirection
 
Import-PSSession $exchangeSession -DisableNameChecking | Out-Null
 
Write-Host "Connected to Exchange Online"


$group = Get-UnifiedGroup | Where { $_.DisplayName -eq $GroupName }

if ($group -ne $null)
{
    $groupId = $group.ExternalDirectoryObjectId

    Get-UnifiedGroupLinks -LinkType Owners -Identity $groupId | ft DisplayName, PrimarySmtpAddress
}
else
{
    Write-Host -ForegroundColor Red "The group $GroupName could not be found."
}

Remove-PSSession $exchangeSession