How to get SSO information from 1 vcmp to another

Hi

Sorry not well described on my part

so I have a cluster - A/P a-vcmp1 & b-vcmp1

I have those syncing

Then I have another cluster another A/P

a-vcmp2 & b-vcmp2 those re sync

I wanted multidomian SSO capabilities

so lets say login & auth VS exist on vcmp1 cluster

and i have test VS on vcmp2

I would like to have SSO capabilities of login into login and then with those credentials log into test

I have that right now but using OAuth between test and auth and using auth as a SP and login as a Idp

But I though I would recheck to see if there was a way to just us MRHSession for my domain and basically get the APM Session table replicated between cluster vcmp1 & vcmp2