I still have not found new formal KBs indicating this is supported/recommended ( Multi site , with Embedded PSCs )
The testing thus far did unlock some answers .
I set up 2 "logical" DCs .
Each with a vCenter 6.5.U2 EMBEDDED PSC .
1> Enhanced linked mode works at is would with external PSCs
2> Embedded appears to the be the suggested way should you want to stretch to Vmware Cloud on AWS .
3> Global permissions work as they would before
4> Adding Windows Integrated AD integrated identify source on VC1/DC1 , automatically showed up on VC2/DC2 as expected .
4> There IS replication occurring on PSC level . I was unable to get vcdrepadmin to show partners etc due to me changing my vSphere.local to lab.local . The command appears to only take administrator under -u , and assumes you have the default vsphere.local SSO domain .
There is one catch though , still requires further testing .
When you build your first PSC , you can enter a site name , like DC1 .
When you join the ""DC2"" embedded PSC to the the DC1 one you cannot enter a site name .
The result looks like this in JXexplorer ( wish I could get vcdrepadmin to work )
Note i have not hashed out any server names as its pure isolated internal homelab .
You can see , DC1 , and then the "'default-first-site''