Hello All,
We recently upgraded our Test environment to the December Update for Dynamics 365 on-premises (Build: 8.2.0.740). Since the update, when trying to either create a new workflow or edit an existing workflow, I am treated with the "Invalid User Authorization: The user authentication passed to the platform is not valid". I have perused the forums and the only material I have found in relation to this error involves users not being able to login to CRM. However, I am able to do everything else. This error appears to only affect workflows. In Production, we are still running CRM 2016 (Build 8.1.0.359), and everything works just fine. This seems to be tied to the December update. Any thoughts or suggestions? Thank you.