Get all Office 365, Azure users with license assignment errors [requires msonline module]

LicenseAssignmentErrors.ps1

$licenseAssignmentErrors = Get-MsolGroup -HasLicenseErrorsOnly $true | % {

    $groupId = $_.ObjectId

    Get-MsolGroupMember -All -GroupObjectId $groupId | 

        Get-MsolUser -ObjectId {$_.ObjectId} |

        Where {$_.IndirectLicenseErrors -and $_.IndirectLicenseErrors.ReferencedObjectId -eq $groupId} |

            Select ObjectId, `
                DisplayName, `
                @{Name="LicenseError";Expression={$_.IndirectLicenseErrors | Where {$_.ReferencedObjectId -eq $groupId} | Select -ExpandProperty Error}
    }
}