Thanks Roger.I have understood that 2 MRA cluster for one domain is not supported to handle 2 CUCM & IMP Cluster's user logins.Instaed, we can use one Exressway cluster to manage 2 CUCM & IMP cluster's user login.   

Do anyone has a solution for this.Can we use 2 Expressway clusters for 2 CUCM and IMP clusters on the same domain,For example,domain - abc.com.saCUCM & IMP - we have 2 clusters, one for Call center agents and another for Corporate users Both agents a...