I have a simple question for writing custom activities. I am following examples by Ensynch and Mark Gabarra, where do I get the assemblies for Microsoft.IdentityManagement.Webui. I cannot seem to locate them to add them to my activity library.

I found this post. Another way to get the DLL is to extract the Microsoft.IdentityManagement.WFExtensionInterfaces.dll from the MicrosoftILMPortalCommonDlls.wsp container, which is located in the %programfiles%\Microsoft Forefront Identity Manager\2010\Portal folder. Copy the MicrosoftILMPortalCommonDlls.wsp file and rename it to *.cab; open that up and extract the assembly. Cheers, Marc