Why are we receiving the “AADDS109: Resources for your managed domain cannot be found” alert?

We recently started receiving the following alert:

AADDS109: Resources for your managed domain cannot be found

This began occurring on the same day as the recent Azure outage (Oct 29).

So far, we’ve taken the following steps:

Ran Microsoft Entra Domain Services Network Diagnostics – all checks passed successfully.

Verified the resource group – no deletions or changes to any objects were found.

Despite this, the alert continues to appear.

What could be causing this issue and how can we resolve it or clear the alert?