A connection was successfully established with the server, but then an error occurred during the login process. (Error Number: 233)

Question

I am having error while connecting to SQL Server:

Details in Stack Trace are:

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Cannot connect to ServerN         


        

Answer 1

the following points work for me. Try:

1. start SSMS as administrator
2. make sure SQL services are running. Change startup type to 'Automatic'

3. In SSMS, in service instance property table, enable below: