Microsoft Dynamics CRM 2011 offers an internet-facing deployment (IFD), just like the previous version. Well, not exactly like the previous version -- you can still set up your CRM deployment to be accessible from the internet for your mobile users, but the process of setting it up is significantly more complicated. CRM 2011 takes advantage of Active Directory Federated Services (ADFS), a standards-based technology for controlling security access to internet services. So, you'll have to set up ADFS on your network, and you'll also have to buy an SSL certificate for your CRM server (which is a good idea anyway).
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