Microsoft Entra Sync Windows service is not running or could not start. As a result, objects will not synchronize with Microsoft Entra ID.

Question

10/8/2025

I keep getting these emails

Alert resolved for my server name

You’re receiving this email because an issue with one of your AadSyncService instances has been resolved.

Title:

Microsoft Entra Connect Sync Service is not running

Description:

Microsoft Entra Sync Windows service is not running or could not start. As a result, objects will not synchronize with Microsoft Entra ID.

Resolved:

October 8, 2025 17:30 UTC

Raised:

October 8, 2025 17:00 UTC

Server:

***my server name***

Service:

***my server name***.onmicrosoft.com

Tenant:

***my server name***

To check health of your services monitored by Microsoft Entra Connect Health, visit the Microsoft Entra Connect Health Portal.

If you no longer wish to receive these notifications, read the instructions for updating your settings. Only global administrators can change settings.

We haven't touched anything but we noticed that Microsoft also had issues:

Between 15:00 UTC to 17:12 UTC on 07 October 2025, a platform issue resulted in an impact to the Microsoft Entra ID (Entra Connect Health) service in the West US region. Customers may have experienced failures with uploading and processing telemetry data for resources hosted in the region.

They claim the issue is fixed, but out Authentication is still screwed, I can't seem to create a ticket in the admin center anymore. (Thanks to some brilliant Gen Z) redesigning support or something. WTF.. HELP :)

Answer 1

It was indeed a Microsoft issue Microsoft_Azure_Issue_Summary_VTF_-1Q0.pdf