We can download the latest SDK for Microsoft CRM 2011, which contains the updates for Polaris and Update Rollup 12 from the link below.
Microsoft Dynamics CRM 2011 Software Development Kit (SDK)
You can also view it online from the link below.
Development for Microsoft Dynamics CRM 2011 and Microsoft Dynamics CRM Online
If you are interested in knowing about the many additions and updates which are available in this release, you can take a look at the article written by Amy Langlois in the article below.
If you want to send any feedback about the SDK, please click here.
I hope this helps the community…
Until next post!