We recently switched over to Office 365 and all was going well until some of our workflows started terminating due to an email error. When we investigated in the advanced email settings, two exchange accounts were present (See below). We are able to send a test email from the Exchange setup in the Workflow administrator module. Also, when we create a new workflow, the two exchange accounts are not present (only one is) and it works.
Anyone experience this issue before? We likely have over 100 workflows that send out emails.