RE: Strange login connectivity issue – SQLServerCentral

SSCertifiable

Points: 6381

September 18, 2017 at 8:25 am

Make sure the user is not part of group that's denied permission.

The links below might be useful

https://blog.sqlauthority.com/2015/08/19/sql-server-login-failed-for-user-reason-token-based-server-access-validation-failed-with-an-infrastructure-error/

https://stackoverflow.com/questions/3159810/token-based-server-access-validation-failed-with-an-infrastructure-error