I should like to use NTLM authentication. But the Alfresco webClient will be deployed with Tomcat on Sun Solaris. I presume that it won't be possible to use NTLM in such situation. Is it correct?
Are the clients on windows? Which browser? Bascially, how do you expect the clients to get an NTLM token in the first place?
If you use the NTLMAuthenticationFilter and the NTLMAuthenticationComponent you shoud be able to specify the AD server to use (using the servers option). See the wiki - http://wiki.alfresco.com/wiki/Configuring_NTLM.
If the client sends NTLM info over, the filter will find it - do any NTLM protocol stuff, and then pass through a token to the underlying NTLMAuthenticationComponent - if wired up. This should allow your box to sit between windows clients and AD.
If there is no token sent you will get the prompt for user name and password.
The NTLM authentication component and filter do not support kerberos tickets at the moment. You may need to lower the settings on the browser to use the old NTLM stuff instead of Kerberos.