We deploy Azure AD Sync for all of our clients that have hybrid environments. Sometimes the Office365 Azure AD Sync might break down, due to the Accidental Deletion Threshold or no longer perform passwords syncs due to other problems. The Azure AD sync client does tend to break from time to time.

To make sure you are alerted when this happens and can jump in on it early, there are a couple of solutions. In the Office365 portal you can easily set up Office365 to send you an email when this happens. I just don’t like receiving emails for critical infrastructure, and our RMM system has the ability to monitor cloud systems.

The scripts below can be used to monitor the Office365 Azure Active Directory Sync for one tenant, or all tenants in one go.

Single tenant script

$TenantName = "ClientDomain.onmicrosoft.com"
$AlertingTime = (Get-Date).AddHours(-24)
$credential = Get-Credential
Connect-MsolService -Credential $credential
$customer = Get-msolpartnercontract | Where-Object {$_.DefaultDomainName -eq $TenantName}

    $DirectorySynchronizationEnabled = (Get-MsolCompanyInformation -TenantId $customer.TenantId).DirectorySynchronizationEnabled
    if ($DirectorySynchronizationEnabled -eq $true) {
        $LastDirSyncTime = (Get-MsolCompanyInformation -TenantId $customer.TenantId).LastDirSyncTime
        $LastPasswordSyncTime = (Get-MsolCompanyInformation -TenantId $customer.TenantId).LastPasswordSyncTime
        If ($LastDirSyncTime -lt $AlertingTime) { $LastDirSync += "Dirsync Failed for $($Customer.DefaultDomainName) - Last Sync time was at $LastDirSyncTime `n" }
        If ($LastPasswordSyncTime -lt $AlertingTime) { $LastPasswordSync += "Password Sync Failed for $($Customer.DefaultDomainName) - Last Sync time was at $LastPasswordSyncTime `n" }
    }

if(!$LastDirSync){ $LastDirSync = "Healthy"}
if(!$LastPasswordSync){ $LastPasswordSync = "Healthy"}

Multiple tenants script

$AlertingTime = (Get-Date).AddHours(-24)
$credential = Get-Credential
Connect-MsolService -Credential $credential
$customers = Get-msolpartnercontract -All
foreach ($customer in $customers) {
    $DirectorySynchronizationEnabled = (Get-MsolCompanyInformation -TenantId $customer.TenantId).DirectorySynchronizationEnabled
    if ($DirectorySynchronizationEnabled -eq $true) {
        $LastDirSyncTime = (Get-MsolCompanyInformation -TenantId $customer.TenantId).LastDirSyncTime
        $LastPasswordSyncTime = (Get-MsolCompanyInformation -TenantId $customer.TenantId).LastPasswordSyncTime
        If ($LastDirSyncTime -lt $AlertingTime) { $LastDirSync += "Dirsync Failed for $($Customer.DefaultDomainName) - Last Sync time was at $LastDirSyncTime `n" }
        If ($LastPasswordSyncTime -lt $AlertingTime) { $LastPasswordSync += "Password Sync Failed for $($Customer.DefaultDomainName) - Last Sync time was at $LastPasswordSyncTime `n" }
    }
}

if(!$LastDirSync){ $LastDirSync = "Healthy"}
if(!$LastPasswordSync){ $LastPasswordSync = "Healthy"} 

And that’s it! With this monitoring set you’ve created a cloud-sided monitoring set that can show you exactly where your Office365 Azure AD Sync fails. As always, Happy PowerShelling.