the SSO at livelink can be implemented very easily because livelink will by default accept REMOTE_USER or in your case HTTP_SMUSER(or whatver)
in other words livelink's auth method can basically vet you in with any variable.
Now to help you out I would try to ask these questions to the client
1)What is the livelink webserver(is it windows IIS or something else)
2)Is it protected by IWA or anonymous
3)What variable is used in haeder authentication(REMOTE_USER is default) a livelink admin should know these things or at least a web admin should know these.
4)The exposed webservices does it have IWA or is it anonymous
5)Is OTDS(Tomcat based RCS webservices auth deployed in the mix)
If 4 turns out to be IWA then your app.config has to change and you would basically write code that
leaves out userid/password.That would mean that your code is running on a computer connected to the domain controller of your org.
If 4 turns out to be anonymous ,then you would authenticate just like you do with the web gui,
but you could run into problems which are best understood by a oscripter meaning most SSO implementations look for REMOTE_USER
and I don't know if it is a hard coded value or not.
If 5 is involved you have to seek authentication based on 1 of 5 scenarios deployed at the client which requires you to patiently look at
the configuration.An internal client within the network will actually ask this authentication service.I have read they support other
header variables but do not know that intimately.
A good undesrtanding of how SSO works in IWA is usually a good start.I have several articles in my blog livelink.in that helps
SSO developers of web services but frankly I would not know how the siteminder thing could be made to work for you.
Let us know how you solved this it may be very easy or may drive you nuts but repay the forum with anything you have learnned
Good Luck
Well, if I called the wrong number, why did you answer the phone?
James Thurber, New Yorker cartoon caption, June 5, 1937
Certified OT Developer,Livelink ECM Champion 2008,Livelink ECM Champion 2010