Error: Cannot Generate SSPI context When someone tries to connect to a SQL Server instance, the error shows up:


  It's not possible do generate SSPI context.


Yesterday we had a blackout (don't know how to say this expression in English) and I had to shut down our servers.

Looking for answers, I found this:

SQL Server 2008 connectivity issue : cannot generate SSPI context

But it doesn't help me, because they're working fine until yesterday. I don't want to change anything. But if a have to, I will change it.

Obs: I can't restart the server now.



Edit: Since I my answer, we haven't had any errors.
'Cannot generate SSPI context' is a generic error. It can be caused by many issues, like an outaded password, clock drift, Active Directory access permissions, failure to register an SPN and so on and so forth. 

There is no solution to this problem. The only 'solution' is to investigate the cause, as per KB811889 and/or Troubleshooting Kerberos Errors. Applying one solution or another from random Internet resources, w/o understanding the cause, may or may not solve the issue, may or may not cause frustration, may or may not cause irrevocable damage.