[CRM 2013] Error: 18456, Severity: 14, State: 11.

Message
Login failed for user ‘Domain\MachineName$'. Reason: Token-based server access validation failed with an infrastructure error. Check for previous errors. [CLIENT: MachineName]

It’s related to SSRS Reporting Server and run as Network Service account. It’s supposed to be good. Because when you added a computer to domain, it will register Local system and Network Service account permission to the SPN records.
That’s why sometime you don’t know WHY you put Network Service account as a service account, then everything will be fixed. (Reference 2)
I’ve been encountered the error for al long time, and I’ve tried lots methods from Google.com

Could not find database ID 0, name 'xxxx'. The database may be offline

https://connect.microsoft.com/SQLServer/feedback/details/529716/problem-with-cannot-find-database-id-0-the-database-may-be-offline

"Now, what I found out: This server has an AUDIT on a database. If the audit is enabled, I get this error. If I disable the audit, the query runs fine."