I started getting suspended workflows with an error stating that "Invalid authorization for connection ''. Credentials may have expired.". I went into the connection manager and updated the credentials to make sure that they were correct, but the workflow still suspends with the same error when I resume the workflow. The account is a service account with the setting that the password never expires.
I updated a different connection with the same account and it seems to work ok.
Solved! Go to Solution.
It looks like restarting the workflow with the updated credentials does work. I'm still not sure why I can't resume the workflow, but it looks like I have a workaround.