Yes. The user2 account is using NTLM on user1's PC.

Hi Derek,

Have you verified that both user accounts are connecting using Kerberos authentication?

[William]. No. It's different authentications using for these TWO accounts connections. NTLM; KERBEROS.

Has user2 tried to log...

Another issue I want to share is that one user (domain\user1) get the error after trying to access the linked server:

"Login Failed for user 'NT Authority\ANONYMOUS' LOGON"

But at the...