Have you seen this one on your MRA (Expressway): “Failed: Unable to communicate with <server name>. UcxnError: ‘HTTPError:403‘”? It happens when you try to add or re-add the Unity Connection node on Expressway under Configuration -> Unified Communications -> Unity Connection servers:
Check if the password that is being used for the connection has expired. The solution is to tick the “Does Not Expire” check box for the user account that is used for the integration:
It’s a simple thing to miss when you implement MRA for Ucxn nodes. Hope this saves somebody some time.