Thank you so much :) I removed the exclamation mark and the logs are looking 
like this now:
File "log" in var/log/bacula:

2013-04-02 09:48:05bacula-x-director JobId 20829: Start Restore Job 
RestoreFiles.2013-04-02_09.48.03_43
2013-04-02 09:48:05bacula-x-director JobId 20829: Gerät »Backup-Storage-10« 
wird verwendet
2013-04-02 09:48:05bacula-x-storage JobId 20829: Ready to read from volume 
"F-x-office_bi-ex2010-01-1365" on device "Backup-Storage-10" (/BACULA/DATA).
2013-04-02 09:48:05bacula-x-storage JobId 20829: Forward spacing Volume 
"F-x-office_bi-ex2010-01-1365" to file:block 1:2704584600.
2013-04-02 09:48:08bacula-x-office_bi-ex2 JobId 20829: -rwxrwxrwx   1 0        
0        813760512 2013-02-22 12:16:02  E:/D/Program Files/Microsoft/Exchange 
Server/V14/Mailbox/ADM-BI-MAILDB-01/ADM-BI-MAILDB-01.edb
2013-04-02 09:48:13bacula-x-director JobId 20829: Bacula bacula-x-director 
5.2.5 (26Jan12):
  Build OS:               x86_64-pc-linux-gnu ubuntu 12.04
  JobId:                  20829
  Job:                    RestoreFiles.2013-04-02_09.48.03_43
  Restore Client:         bacula-x-office_bi-ex2010-01
  Start time:             02-Apr-2013 09:48:05
  End time:               02-Apr-2013 09:48:13
  Files Expected:         1
  Files Restored:         1
  Bytes Restored:         0
  Rate:                   0.0 KB/s
  FD Errors:              0
  FD termination status:  OK
  SD termination status:  OK
  Termination:            Restore OK

2013-04-02 09:48:13bacula-x-director JobId 20829: Begin pruning Jobs older than 
3 months .
2013-04-02 09:48:13bacula-x-director JobId 20829: No Jobs found to prune.
2013-04-02 09:48:13bacula-x-director JobId 20829: Beginn automatische 
Säuberung von Dateien.
2013-04-02 09:48:13bacula-x-director JobId 20829: No Files found to prune.
2013-04-02 09:48:13bacula-x-director JobId 20829: Ende automatische Säuberung.


This is an extract of var/log/bacula-sd-debug.log:

02-Apr 09:38 bacula-x-storage: ERROR in dircmd.c:155 Connection request from 
client failed.
02-Apr 09:40 bacula-x-storage: ERROR in dircmd.c:155 Connection request from 
client failed.
02-Apr 09:42 bacula-x-storage: ERROR in dircmd.c:155 Connection request from 
client failed.
02-Apr 09:44 bacula-x-storage JobId 20828: Ready to read from volume 
"F-x-office_bi-ex2010-01-1365" on device "Backup-Storage-10" (/BACULA/DATA).
02-Apr 09:44 bacula-x-storage JobId 20828: Forward spacing Volume 
"F-x-office_bi-ex2010-01-1365" to file:block 1:2704584600.
02-Apr 09:44 bacula-x-storage: ERROR in dircmd.c:155 Connection request from 
client failed.
02-Apr 09:46 bacula-x-storage: ERROR in dircmd.c:155 Connection request from 
client failed.
02-Apr 09:48 bacula-x-storage JobId 20829: Ready to read from volume 
"F-x-office_bi-ex2010-01-1365" on device "Backup-Storage-10" (/BACULA/DATA).
02-Apr 09:48 bacula-x-storage JobId 20829: Forward spacing Volume 
"F-x-office_bi-ex2010-01-1365" to file:block 1:2704584600.
(END)

I am not really sure, how these entries help me or if there are any further 
logs, that help me better.

Thanks so much for help, best regards...

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