We have Siteminder agent for SharePoint 2013 and the authentication part works fine. However the people picker doesn't work as expected with SharePoint. When a user can be granted access only if we search for them using the user identifier claim, if a user is searched by other claims like email, etc, the search provides results however we can't grant access as its a not linked to the user of other claims. Additionally when a user is granted access using people picker after searching by user identifier claims other claim information is not displayed and populated correctly. I think the claims for a user looks like a different identity.
CA support mentioned that this is a limitation with the Siteminder agent for SharePoint, does anyone have a solution, workaround for this issue. The claims provider webservice is very limited and if someone has already done some customization with it please share it.