Register SPN for Windows Server

Suppose - 

The server name is - Server1

Alias name is - App1

AD Domain name is - company.local

• First, create a CNAME record for App1 against Server1 in DNS.
• Let it replicate properly.
• Once replication is done, login to Server1 and run the following commands in elevated mode:

netdom computername server1 /add:app1

netdom computername server1 /add:app1.company.local

• restart server1.