ERROR: ESB.Portal is unable to send Email Notification to its subscribers

Verify the following key elements are correctly setup in your BizTalk Server.

1. Open Services window and verify the service named “BizTalk ESB Exception Notification” is “Started”.  In my case even though the service is configured to start Automatic but it never started.  I had to start it manually.

2. If the following error occurred then search for the xslt file in your “C:\Program Files” folder.  It was found under C:\Program Files\Microsoft BizTalk ESB Toolkit 2.0\Exception Notification Service\ then copy it to 'C:\Program Files\Microsoft ESB Guidance Exception Notification Service 1.0 - November 2007\.  Create the folder if not already present.

Error: The XSLT file for creating rich HTML email could not be found in the following location, 'C:\Program Files\Microsoft ESB Guidance Exception Notification Service 1.0 - November 2007\EmailTransformation.xslt'.

The subscriber should start getting emails now.