Hi,
Thank you for posting in Symantec community.
I would be glad to answer your query.
Q. Can I copy client list to new SEPM without login? (2 server SEPM are same version)
--> Do you have database backup of old server, if yes restore the same into new SEPM.
By default database backup will be at SEPM installed drive, under C:\ Program files(x86)\Symantec\Symantec Endpoint Protection Manager\data\backup folder
Restore the backup by running database backup & restore wizard.
Note: Old SEPM & New SEPM hostname and IP address should be the same.