I did reboot. As soon from the command listed previously, I use the same inputs for both CRMAdmin and CRMSandbox. I wonder if that is the issue. setspn -X gives me
HTTP/[SbsComputerName].[Domain].local is registered on these accounts
CN=CRM Sandbox,OU=SBSUsers,OU=Users=OU=MyBusiness,DC=[domain],DC=local
CN=CRM Admin,OU=SBSUsers,OU=Users=OU=MyBusiness,DC=[domain],DC=local
HTTP/[SbsComputerName] is registered on these accounts
CN=CRM Sandbox,OU=SBSUsers,OU=Users=OU=MyBusiness,DC=[domain],DC=local
CN=CRM Admin,OU=SBSUsers,OU=Users=OU=MyBusiness,DC=[domain],DC=local
found 2 groups of duplicate SPNs
So if I can't use the same arguments for both users (CRMAdmin & CRMSandbox) then what do I need to use for each of them?