Java EE (Java Enterprise Edition) General Discussion

With version 1.3.3 I could connect to a another users mailbox by using mydomain\myuserid\othermailboxname as the connecting user.
With version 1.4.4 I can't anymore but I'm connected to my own maibox instead.

Below are the complete traces:
h1. 1.3.3
DEBUG: setDebug: JavaMail version 1.3.3
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc]
* OK Microsoft Exchange Server 2003 IMAP4rev1 server version 6.5.7638.1 (SERVERNAME.DOMAIN.DV.BE) ready.
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 IDLE LOGIN-REFERRALS MAILBOX-REFERRALS NAMESPACE LITERAL+ UIDPLUS CHILDREN AUTH=NTLM
A0 OK CAPABILITY completed.
IMAP DEBUG: AUTH: NTLM
DEBUG: protocolConnect login, host=servername.domain.dv.be, user=DOMAIN\USERNAME\MAILBOX_NAME, password=<non-null>
A1 LOGIN "DOMAIN\\USERNAME\\MAILBOX_NAME" password
A1 OK LOGIN completed.

h1. 1.4.4
DEBUG: setDebug: JavaMail version 1.4.4
DEBUG: getProvider() returning javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Sun Microsystems, Inc]
DEBUG: trying to connect to host "SERVERNAME.DOMAIN.DV.BE", port 143, isSSL false
* OK Microsoft Exchange Server 2003 IMAP4rev1 server version 6.5.7638.1 (SERVERNAME.DOMAIN.DV.BE) ready.
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 IDLE LOGIN-REFERRALS MAILBOX-REFERRALS NAMESPACE LITERAL+ UIDPLUS CHILDREN AUTH=NTLM
A0 OK CAPABILITY completed.
DEBUG IMAP: AUTH: NTLM
DEBUG: protocolConnect login, host=SERVERNAME.DOMAIN.DV.BE, user=DOMAIN\USERNAME\MAILBOX_NAME, password=<non-null>
A1 AUTHENTICATE NTLM
+
DEBUG NTLM: type 1 message: 4E 54 4C 4D 53 53 50 00 01 00 00 00 03 B2 00 00 05 00 05 00 28 00 00 00 08 00 08 00 20 00 00 00 44 56 57 46 30 34 38 35 44 56 53 59 53
TlRMTVNTUAABAAAAA7IAAAUABQAoAAAACAAIACAAAABEVldGMDQ4NURWU1lT
+ TlRMTVNTUAACAAAAAAAAADgAAAABggACjWJVmEtnaowAAAAAAAAAAAAAAAA4AAAABQLODgAAAA8=
DEBUG NTLM: type 3 message: 4E 54 4C 4D 53 53 50 00 03 00 00 00 18 00 18 00 88 00 00 00 18 00 18 00 A0 00 00 00 0A 00 0A 00 40 00 00 00 2E 00 2E 00 4A 00 00 00 10 00 10 00 78 00 00 00 00 00 00 00 B8 00 00 00 01 82 00 00 44 00 56 00 53 00 59 00 53 00 44 00 30 00 30 00 32 00 39 00 33 00 34 00 5C 00 44 00 56 00 56 00 4C 00 41 00 50 00 2E 00 43 00 4C 00 41 00 49 00 4D 00 53 00 5F 00 4F 00 44 00 56 00 57 00 46 00 30 00 34 00 38 00 35 00 EB 91 AA D4 9B A3 BD B8 62 5C 8F 8E 1A 39 09 F5 12 13 A8 BA B1 29 6C 9A DE C8 DF A4 91 52 4D 70 25 6B 96 DF CC DB 43 E5 6A F3 74 A4 A8 F9 DE 1E
TlRMTVNTUAADAAAAGAAYAIgAAAAYABgAoAAAAAoACgBAAAAALgAuAEoAAAAQABAAeAAAAAAAAAC4AAAAAYIAAEQAVgBTAFkAUwBEADAAMAAyADkAMwA0AFwARABWAFYATABBAFAALgBDAEwAQQBJAE0AUwBfAE8ARABWAFcARgAwADQAOAA1AOuRqtSbo724YlyPjho5CfUSE6i6sSlsmt7I36SRUk1wJWuW38zbQ+Vq83SkqPneHg==
A1 NO Logon failure: unknown user name or bad password.
DEBUG: trying to connect to host "SERVERNAME.DOMAIN.DV.BE", port 143, isSSL false
* OK Microsoft Exchange Server 2003 IMAP4rev1 server version 6.5.7638.1 (SERVERNAME.DOMAIN.DV.BE) ready.
A0 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 IDLE LOGIN-REFERRALS MAILBOX-REFERRALS NAMESPACE LITERAL+ UIDPLUS CHILDREN AUTH=NTLM
A0 OK CAPABILITY completed.
DEBUG IMAP: AUTH: NTLM
DEBUG: protocolConnect login, host=SERVERNAME.DOMAIN.DV.BE, user=USERNAME, password=<non-null>
A1 AUTHENTICATE NTLM
+
DEBUG NTLM: type 1 message: 4E 54 4C 4D 53 53 50 00 01 00 00 00 03 A2 00 00 00 00 00 00 28 00 00 00 08 00 08 00 20 00 00 00 44 56 57 46 30 34 38 35
TlRMTVNTUAABAAAAA6IAAAAAAAAoAAAACAAIACAAAABEVldGMDQ4NQ==
+ TlRMTVNTUAACAAAAAAAAADgAAAABggACBWpv2GOybpwAAAAAAAAAAAAAAAA4AAAABQLODgAAAA8=
DEBUG NTLM: type 3 message: 4E 54 4C 4D 53 53 50 00 03 00 00 00 18 00 18 00 5E 00 00 00 18 00 18 00 76 00 00 00 00 00 00 00 40 00 00 00 0E 00 0E 00 40 00 00 00 10 00 10 00 4E 00 00 00 00 00 00 00 8E 00 00 00 01 82 00 00 44 00 30 00 30 00 32 00 39 00 33 00 34 00 44 00 56 00 57 00 46 00 30 00 34 00 38 00 35 00 81 DF 87 91 77 0B 0B 28 4C 7B 44 7C 0A 35 0B 70 D6 BA 09 60 71 3A B4 92 22 95 90 29 5C 6F 8D 07 6A D5 00 A4 FD 59 0A 34 02 7E E5 F6 6E 50 4E 6A
TlRMTVNTUAADAAAAGAAYAF4AAAAYABgAdgAAAAAAAABAAAAADgAOAEAAAAAQABAATgAAAAAAAACOAAAAAYIAAEQAMAAwADIAOQAzADQARABWAFcARgAwADQAOAA1AIHfh5F3CwsoTHtEfAo1C3DWuglgcTq0kiKVkClcb40HatUApP1ZCjQCfuX2blBOag==
A1 OK AUTHENTICATE completed.
A2 CAPABILITY
* CAPABILITY IMAP4 IMAP4rev1 IDLE LOGIN-REFERRALS MAILBOX-REFERRALS NAMESPACE LITERAL+ UIDPLUS CHILDREN AUTH=NTLM
A2 OK CAPABILITY completed.
DEBUG IMAP: AUTH: NTLM

Apparently the connection with DOMAIN\USERNAME\MAILBOX_NAME fails and javamail retries to connect with USERNAME which succeeds but is actually a connection to the mailbox of USERNAME and not to the intended MAILBOX_NAME.
Is this due to the integration of NTLM and isf so can this be switched off?

regards,
Stefaan