Login failed for user ‘NT AUTHORITY\ANONYMOUS LOGON’. Reason: Token-based server access validation failed with an infrastructure error.

Source Logon

Error: 18456, Severity: 14, State: 11.

Note: This error seems to happen when trying to query the database using SQL Server Manager Studio (SSMS) on a remote computer. This error does not happen when remote desktop on to the server and using SSMS.

Possible Fix:

If the message only comes with local connectivity and same account works fine remotely then it could be a UAC issue. This means that Elevation is required to connect properly, but you do not see any of the normal prompts to elevate. To use elevation (while launching the SSMS to connect to a locally running instance of SQL) Right click->Select “Run as administrator”.


Last modified: August 19, 2020



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