[Samba] smbclient connection failes sometimes while connecting users via Active Directory

[Perzyna Andrzej,DI.]

Hello mailing friends,

We have troubles and hopefully you can help us out.
There is a problem either on Samba-side or Active Directory but we are 
not sure where exactly.
This problem happens from time to time to each user, especially when 
many users try to connect at the same time.

The following debugging message comes out by using the command: 
smbclient -U username=DOMAIN\\pez -n EDV80 -d 10 //SERVER/share

...
write_socket(6,72)
write_socket(6,72) wrote 72
Sent session request
got smb length of 0
size=0
smb_com=0x0
smb_rcls=0
smb_reh=0
smb_err=0
smb_flg=0
smb_flg2=0
smb_tid=0
smb_pid=0
smb_uid=0
smb_mid=0
smt_wct=0
smb_bcc=0
  session request ok
write_socket(6,180)
write_socket(6,180) wrote 180
got smb length of 35
size=35
smb_com=0x73
smb_rcls=2
smb_reh=0
smb_err=2
smb_flg=136
smb_flg2=32769
smb_tid=0
smb_pid=28518
smb_uid=0
smb_mid=3
smt_wct=0
smb_bcc=0
cli_session_setup: NT1 session setup failed: NT_STATUS_WRONG_PASSWORD
lang_tdb_init: /usr/lib64/samba/.msg: Datei oder Verzeichnis nicht gefunden
session setup failed: ERRSRV - ERRbadpw (Bad password - name/password 
pair in a Tree Connect or Session Setup are invalid.)

the successfull connection looks like this:
...
write_socket(6,72)
write_socket(6,72) wrote 72
Sent session request
got smb length of 0
size=0
smb_com=0x0
smb_rcls=0
smb_reh=0
smb_err=0
smb_flg=0
smb_flg2=0
smb_tid=0
smb_pid=0
smb_uid=0
smb_mid=0
smt_wct=0
smb_bcc=0
  session request ok
write_socket(6,172)
write_socket(6,172) wrote 172
got smb length of 147
size=147
smb_com=0x73
smb_rcls=0
smb_reh=0
smb_err=0
smb_flg=136
smb_flg2=32769
smb_tid=0
smb_pid=28666
smb_uid=45349
smb_mid=3
smt_wct=3
smb_vwv[ 0]=  255 (0xFF)
smb_vwv[ 1]=    0 (0x0)
smb_vwv[ 2]=    0 (0x0)
smb_bcc=106
[0000] 4A 00 61 00 76 00 61 00   20 00 56 00 69 00 72 00   J.a.v.a.  .V.i.r.
[0010] 74 00 75 00 61 00 6C 00   20 00 4D 00 61 00 63 00   t.u.a.l.  .M.a.c.
[0020] 68 00 69 00 6E 00 65 00   00 00 69 00 46 00 53 00   h.i.n.e. ..i.F.S.
[0030] 20 00 53 00 4D 00 42 00   20 00 53 00 65 00 72 00    .S.M.B.  .S.e.r.
[0040] 76 00 65 00 72 00 20 00   76 00 39 00 2E 00 30 00   v.e.r. . v.9...0.
[0050] 2E 00 34 00 2E 00 32 00   2E 00 32 00 36 00 00 00   ..4...2. ..2.6...
[0060] 54 00 55 00 45 00 56 00   00 00                    DOMAIN ..
cli_init_creds: user username=DOMAIN\pez domain DOMAIN

Thnx in advance, waiting for your response

-- 
Lg,
Andy