Install of SCVMM 2025 on Server 2025 not able to complete the setup, try all the suggest from Co-Pilot

Question

Virtual Machine Manager cannot process the request because an error occurred while authenticating 'MYSERVER.abcd.fg'. Possible causes are:

1. The specified user name or password are not valid.
2. The Service Principal Name (SPN) for the remote computer name and port does not exist.
3. The client and remote computers are in different domains and there is not a two-way full trust between the two domains.

Log in by using an account on the same domain as the VMM management server, or by using an account on a domain that has a two-way full trust with the domain of the VMM management server, and then try the operation again. If this does not work, purge the Kerberos tickets on the VMM management server by using kerbtray.exe, available at http://www.microsoft.com/en-us/download/details.aspx?id=17657. Then, reset the SPN for 'MYSERVER.abcd.fg' by using setspn.exe. If this still does not fix the problem, make 'MYSERVER.abcd.fg' a member of a workgroup instead of a domain, restart the computer, rejoin the domain, and then try the operation again.

Can help to guide me to where is the possible problem cause?

Answer 1

Check Username and Password: Ensure that the username and password you are using are correct.

Verify SPN: Make sure that the Service Principal Name (SPN) for the remote computer name and port exists. You can use the setspn.exe tool to check and set the SPN.

Domain Trust: Confirm that the client and remote computers are in the same domain or that there is a two-way full trust between the domains. If they are in different domains without a two-way trust, you may encounter authentication issues.

Purge Kerberos Tickets: If the above steps do not resolve the issue, try purging the Kerberos tickets on the VMM management server using kerbtray.exe. You can download it here.

Reset SPN: Use setspn.exe to reset the SPN for 'MYSERVER.abcd.fg'.

Rejoin Domain: If the problem persists, consider making 'MYSERVER.abcd.fg' a member of a workgroup instead of a domain, restart the computer, rejoin the domain, and then try the operation again

Answer 2

Please refer to the official documentation to fix the SPN-related issues.

https://learn.microsoft.com/en-us/system-center/vmm/plan-install?view=sc-vmm-2025#spn

Answer 3

Have you reviewed the setup log? Are there any clues?