Background:
I'm using a Managed Identity to connect to Azure Service Bus. I Have access roles configured for the identity and everything was connecting and working. Yesterday afternoon this suddenly stopped working and I began receiving the following Exception:
Microsoft.Azure.Amqp.AmqpException: 'Put token failed. status-code: 401, status-description: InvalidIssuer: Token issuer is invalid.
This begin happening on our servers as well as from a function app that was currently running in Azure. No changes that I am aware of were made to the permissions or the Managed Identity, though I did deploy a couple of new topics and subscriptions using a resource manager template. I'm at my wits end trying to get things back up and running and have had no luck finding any resources online.