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I have been reading through past posts but I am still getting issues with 2 SQL servers connecting using a linked server when querying from a 3rd SQL server. I constantly get the error "Login failed for user NT AUTHORITY\ANONYMOUS"

I have set the SPNs correctly using the Kerberos Configuration Manager provided by Microsoft for the service account SQL is running as on each machine. I have also been reading that if the computer contains a linked server then the computer object in AD needs trusting for delegation is that correct? Also do the service accounts need trusting for delegation?

I can't just make the changes to test so I need to get this right beforehand.

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    Yes, the computer and service accounts must be able to delegate, without that right, active directory doesn't trust them to present accounts for validation. – Max Vernon Mar 30 '15 at 13:04
  • I had this problem too but didn't find the solution. I bypassed it by using SQL authentication instead. This works like a charm. – BuahahaXD Mar 30 '15 at 13:51
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    OK I will get the delegation added and see how it goes. – Tom Mar 30 '15 at 14:40
  • I have go the service account and computer objects changed to Trust this user for delegation to any Service (Kerberos only) and I still get the failed Anonymous Login problem. – Tom Mar 31 '15 at 15:31

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