Теперь после добавления N вот такая ошибка:
Executing the query "DECLARE @Nw3 NVARCHAR(512)
SET @Nw3 = N'\\\\192.168.10.2\\bukh\\bukh_' + Convert(varchar(8), GETDATE(), 112) + N'.bak'
BACKUP DATABASE [bukh] TO DISK = @Nw3 WITH NOFORMAT, INIT, NAME = N'db_backup', SKIP, NOREWIND, NOUNLOAD, STATS = 10" failed with the following error: "Cannot open backup device '\\\\192.168.10.2\\bukh\\bukh_20170724.bak'. Operating system error 5(Отказано в доступе.).
BACKUP DATABASE is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.