Hi,
I don't think there is very much information provided to share a document on.
You can ideally check configuration steps for Zimba or other third party servers online.
For configuration on the ESA you can always refer to the end user guide to review and understand the working of the ESA.
www.cisco.com/c/dam/en/us/td/docs/security/esa/esa9-7/ESA_9-7_User_Guide.pdf
Thank You!
Libin Varghese