You might have observed the below message in the event viewer that your ESSO master secret has exceeded one year and it is recommended that your master secret key needs to be updated after a one year lifetime.
It is a requirement of the Secure Development Lifecycle – “Limit Cryptographic Key Lifetimes” o limit the age of passwords/secrets, which we implemented as a warning.
In the next upcoming BizTalk versions (2016 onwards) it will be strictly enforced. (i.e. you will be forced to change the secret)
1. If you see this errror/ waring message in event viewer, You might need to consider to install these two patches first.
https://support.microsoft.com/en-us/kb/3000847 - Bad data fix for corrupted key
https://support.microsoft.com/en-us/kb/3062831 - Memory leak caused by previous fix
Take a backup of your existing key. Regenerate your Master Secret key.