I have configured Exchange Server 2016 DAG Environment wherein i used servers for the below mentioned roles-

DAG Name – DAG-01
DAG IPs : 192.168.10.7 and 192.168.2

PR-Site:
PR-Site Domain Controller – 192.168.10.2
Mailbox Server (MB-PR1) – 192.168.10.3
Mailbox Server (MB-PR2) – 192.168.10.4
PR Witness Server (PRWTNS) – 192.168.20.5

DR-Site
DR-Site Domain Controller – 192.168.20.2
Mailbox Server (MB-DR1) – 192.168.20.3
DR Witness Server (DRWTNS) – 192.168.20.5

And one Remote server RMT-SRV (192.168.10.6) where WinRM configured to access the DAG remotely.

Active Directory Site is created between both Domain Controllers to replicate data.

Added the Mailbox database Copy of MB-PR1 on MB-PR2 and MB-DR1 , and vice versa added other Mailbox servers database copies.

When PAM role moved from MB-PR1 to MB-DR1 that time that time DAG DR IP : 192.168.20.6 start pinging , at a time only one IP ping. which site the PAM role is only that DAG ip ping. but DAG-01 is connecting only when PAM role is at PR Site.

When the PrimayActiveManager (PAM Role) is on MB-PR1 then I am able to access DAG remotely from powershell, and when i move this PAM role to MB-DR1 Mailbox server then i am unable to access the DAG remotely from Powershell and getting below error

Error
New-PSSession : [dag-01.exc2016dom.com] Connecting to remote server dag-01.exc2016dom.com failed with the following error message : WinRM cannot process the request because the input XML
contains a syntax error. For more information, see the about_Remote_Troubleshooting Help topic.
At line:1 char:12

• $Session = New-PSSession -ConfigurationName Microsoft.Exchange -Conne …

•        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

  • CategoryInfo : OpenError: (System.Manageme….RemoteRunspace:RemoteRunspace) [New-PSSession], PSRemotingTransportException
  • FullyQualifiedErrorId : -2144108477,PSSessionOpenFailed

Commands:
$UserCredential = Get-Credential
$Srv1 = “DAG-01.exc2016dom.com”
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri http://$Srv1/PowerShell/ -Authentication Kerberos -Credential $UserCredential

Can someone please help? Thanks in advance.

Firewall Disabled on all Mailbox servers.
Given the DNS Entry.