SiteMinder Federation Security Services generates multi-valued SAML claims in a format not understood by Microsoft SharePoint 2010.
By design in this release.
This KB provides a way to use multi-valued SAML claims with Microsoft SharePoint 2010 and CA SiteMinder Federation Security Services (SMFSS) 12.0.2.x and 188.8.131.52 using the referenced Assertion Generator Plug-in (AGP). This AGP is not required for SiteMinder FSS 184.108.40.206 or higher and is not supported with Federation Manager Standalone.
For complete instructions about how to configure Federation between SiteMinder and SharePoint 2010 refer to the paper Configuring Identity Federation between CA SiteMinder and Microsoft SharePoint 2010, which can be found on the Microsoft Interop Vendor Alliance website http://interopvendoralliance.org/Labs.aspx.
For the document "SMFSS SharePoint 2010 AGP Sample Configuration", click here.
For the sample AGP, click here.