My large company is looking at chatting applications, but isn't considering LCS. Does anyone know if the LCS client is compatible with outside users on windows messanger. I've used it once in, but i'm not sure if that was not available or just not in use. I would really rather use LCS, but I think it will be a deal breaker if it won't allow others outside the domain to chat to users in the domain.

LCS
Steve Tyson
see more info here
http://www.microsoft.com/office/livecomm/prodinfo/publicim.mspx
Ken Schall
Not sure how a technology like IRC would provide all the wonderful features of communications server, it would be fun, but it's been a while since i've setup an eggdrop :)
Matt_chrs
According to the post, here is my answer as following:< xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
As far as I know, the LCS does support chatting across the intranet and internet, select the Options menu item from the Tools menu of Windows Messenger and click the "Accounts" tab, you can see that there is an area for SIP Communication Service Account; you can configure your LCS account there. And what's more, by click the "Advanced" button right to the "Sign name" textbox, Messenger will pop up a dialog for you to configure the server locations information. Once you select the Configure Settings option button, you can input the server IP address manually so that the domain users can chat even over the outside network.
However there are still some problem remains for us, first the chatting over outside network is not secured and is not suggested by us Microsoft although the messenger support TLS transport, LCS server is designed to be used in the intranet! Second, the users who want to sign on the Messenger requires a domain account even over the internet, so you should assign a domain account to anyone who want to join the chat.
As an alternative choice, you can also consider the Chatting Service within the Exchange Server which implements the chatting protocol like IRC, it will be more suitable for chatting across inside and outside network.
I hope this helps!
-brenda (ISV Buddy Team)
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This posting is provided "AS IS" with no warranties, and confers no rights.
AllanP