Hello,
I think, for Vista, you'll have to use Office Communicator
http://office.microsoft.com/en-us/communicator/FX101729051033.aspx .
Greetings,
P. Di Stolfo

Signature
//-----------------------------------------------------------------------------------------------------------
// http://blog.lysorp.com - small Windows Blog in German language
//-----------------------------------------------------------------------------------------------------------
> Hi,
>
[quoted text clipped - 6 lines]
> Vista Business with SIP facility??? Understanding that we were able to run
> 5.1 on WindowsXP.
Jonathan Kay [MVP] - 09 Sep 2007 04:18 GMT
Hi,
Actually Communicator isn't a good option here because you need to have a CAL for it and its
designed to only work with Live Communications Server. The previous SIP integration in
Windows Messenger 5.1 allowed all kinds of SIP devices and services.

Signature
Jonathan Kay
Microsoft MVP - Windows Live Messenger/MSN Messenger/Windows Messenger
Associate Expert
http://www.microsoft.com/windowsxp/expertzone/
Messenger Resources - http://messenger.jonathankay.com
All posts unless otherwise specified are (c) 2007 Jonathan Kay.
You *must* contact me for redistribution rights.
--
> Hello,
>
[quoted text clipped - 11 lines]
>> Vista Business with SIP facility??? Understanding that we were able to run
>> 5.1 on WindowsXP.
Mark Mahoney - 18 Sep 2007 13:38 GMT
Does 5.1 install on Vista? I've tried and it fails adn I need SIP
configurations.
Thanks,
Mark
> Hi,
>
[quoted text clipped - 17 lines]
> >> Vista Business with SIP facility??? Understanding that we were able to run
> >> 5.1 on WindowsXP.
Ajay Jha - 17 Oct 2007 13:56 GMT
Hi Mark,
I have installed Microsoft Office Communicator 2005 on my Laptop for Vista
OS and it is working very fine. Its been one month now & till date I didn't
find any difficulty. You may access the same from :
http://office.microsoft.com/en-us/communicator/FX101729051033.aspx
Regards
Ajay
> Does 5.1 install on Vista? I've tried and it fails adn I need SIP
> configurations.
[quoted text clipped - 24 lines]
> > >> Vista Business with SIP facility??? Understanding that we were able to run
> > >> 5.1 on WindowsXP.
Ajay Jha - 21 Sep 2007 08:38 GMT
Wow!!!!!!!
Thanks Stolfo............ its a great idea. Office Communicator is working
fine now on Vista with SIP.
I don't know how I should convey my thanks to you but...... still Thank you
very much. It was really a big problem for me.
Regards
Ajay Jha
> Hello,
>
[quoted text clipped - 13 lines]
> > Vista Business with SIP facility??? Understanding that we were able to run
> > 5.1 on WindowsXP.
P. Di Stolfo - 21 Sep 2007 13:59 GMT
You're very welcome!
Greetings,
P. Di Stolfo

Signature
//-----------------------------------------------------------------------------------------------------------
// http://blog.lysorp.com - small Windows Blog in German language
//-----------------------------------------------------------------------------------------------------------
> Wow!!!!!!!
> Thanks Stolfo............ its a great idea. Office Communicator is working
[quoted text clipped - 26 lines]
>> > run
>> > 5.1 on WindowsXP.