Following the 2021.4.1 release for Datto Workplace (v8.13.2) on 10-November-2021, users experienced an issue which caused Azure Active Directory authentication to Workplace Online and Azure Active Directory synchronisation to fail.
In the release there was a change to the integration with Microsoft Azure AD. The change was related to the deprecation of the previous Microsoft Azure API, and migration to the new Azure AD Graph API. The update went through QA testing as well as testing in a live environment. However there were for some customers configuration differences that caused the failure to surface that had not been caught in the QA phase.
Our Engineering team deployed a fix to correct the problem on 11-November-2021 by 20:00 UTC