VEEAM Unable to truncate SQL server transaction log

ERROR REPORTADO

Unable to truncate SQL server transaction logs. Details: Failed to process 'TruncateSQLLog' command.
Failed to truncate transaction logs for SQL instances: MSSQLSERVER.
Possible reasons: lack of permissions, or transaction log corruption.

SOPORTE VEEAM 

https://www.veeam.com/es/kb2027

OLEDB Error: 'The server principal "NT AUTHORITY\SYSTEM" is not able to access the database "Reglame" under the current security context.', HelpCtx: '0' 4/21/2017 12:00:51 AM  10064                              Truncating database logs (SQL instance: w2k12-mssql_server\MSSQLSERVER). User: NT AUTHORITY\SYSTEM. Ok. 4/21/2017 12:00:51 AM  10064 Truncate statistics. 4/21/2017 12:00:51 AM  10064                          Using account user_veeam

SOLUCION

2) OLEDB Error: 'The server principal "DOMAIN\user" is not able to access the database "DATABASE" under the current security context.', HelpCtx: '0'
Solución: dar rol de DOMAIN\user db_backupoperator  para FULL y BULK databases, o darle el rol de sysadmin.

Desde base de datos realizar lo siguiente:

USE [Reglame]

GO

CREATE USER [W2K12-MSSQL14P\user_veeam] FOR LOGIN [W2K12-MSSQL_SERVER\user_veeam]

ALTER USER [W2K12-MSSQL_SERVER\user_veeam] WITH DEFAULT_SCHEMA=[dbo]

ALTER ROLE [db_backupoperator] ADD MEMBER [W2K12-MSSQL_SERVER\user_veeam]

HL