Authenticating Outlook to Cyrus-Imap

[Dr. Lars Hanke]

Hi there,

I - well not me actually - would like to use Outlook to access my Cyrus-Imap 
mailstore. I've setup Cyrus to use SASL auxprop for ldapdb authentication 
using DIGEST-MD5. If I test with:

imtest -u user -a user -m NTLM server

everything is fine. However, login from Outlook fails, producing the following 
auth.log:

Mar 14 23:16:54 localhost cyrus/imapd[20511]: NTLM server step 1
Mar 14 23:16:54 localhost cyrus/imapd[20511]: client flags: ffffb207
Mar 14 23:16:54 localhost cyrus/imapd[20511]: NTLM server step 2
Mar 14 23:16:54 localhost cyrus/imapd[20511]: client user: user
Mar 14 23:16:54 localhost cyrus/imapd[20511]: client domain: UAC
Mar 14 23:16:54 localhost cyrus/imapd[20511]: DIGEST-MD5 client step 2
Mar 14 23:16:54 localhost cyrus/imapd[20511]: DIGEST-MD5 client step 2
Mar 14 23:16:54 localhost cyrus/imapd[20511]: DIGEST-MD5 client step 3
Mar 14 23:16:54 localhost cyrus/imapd[20511]: calculating NT response
Mar 14 23:16:54 localhost cyrus/imapd[20511]: incorrect NTLM response

imtest differs in the following lines:
Mar 14 23:17:42 localhost cyrus/imapd[20511]: client flags: 207
Mar 14 23:17:47 localhost cyrus/imapd[20511]: client domain: VERDANI

I assume that the domain is hashed into the NTLM authentication token. The 
local test uses the server name, whilst the Outlook test uses the domain as 
supplied from my samba PDC.

Is there a sensible solution for this issue?

Have fun,
 - lars.
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