2 years ago I took intro to SQL DBA 2 and never touch an SQL server until April of this year. I have 2 problems I hope you all can help me:
1. Since the day our DBA left, there's this error message every minute in the Serever Agent error log file:
 SQLServer Error: 15404, Could not obtain information about Windows NT group/user 'domain\username', error code 0x534. [SQLSTATE 42000] (ConnIsLoginSysAdmin).
I looked through all the job or maintenance job plan and don't see anything that have the username appear anywhere. Where can that error coming from ?
2. At 3AM everynight since our DBA left, these errors message also appear in the Server Agent error log file:
 SQLServer Error: 4060, Cannot open database "SQLdmRepository" requested by the login. The login failed. [SQLSTATE 42000]
 SQLServer Error: 18456, Login failed for user 'domain\sqlservices'. [SQLSTATE 28000]
I found in the daily job schedule there's a job that call "groom SQLdmRepository" and in the Steps it has this "EXEC [p_GroomRepository]". I can't find anywhere what this "GroomRepository" is about.
I also asked users if they experience anything weird with the database and all answer no.
Any help is appreciate....