VERIFIED SOLUTION i

Can EngageOne be installed in an Active-Active cluster?

Product Feature: Clustered Installation
 
An Active-Active clustered configuration is not supported with EngageOne®, only Primary and Replica nodes. If there was a single database shared by two Active nodes, it would cause conflict in the database.

Steps to install in a clustered configuration are included in the Installation Guide (EngageOne clustered install section) shipped as a part of product documentation.
UPDATED:  July 17, 2018