[Users] authentication in multi-domain

hi all, Thanx Klaus and Bogdan, for rectifying my idea about using Openser in multi-domain environment. It did help me a lot. But sorry to ask one more question regarding the same issue. How do we authenticate the clients in multi-domain environment. I beleive openser allows to add users with same username in different domain!! If so then is it required that, when a call is made to such user the caller needs to specify the complete username with domain.. I did not actually check how it works but i thought just to clear the doubt. And how do we authenticate the users registered in different domains. pls help me understand this.. Thanx a lot for previous responses. Jayesh ____________________________________________________ Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs