Hi Angela,
It is not possible to popuate E911 information from Active directory at present. But I think this function can be developed. I suggest you post you question to Lync MSDN forum, maybe someone can help you:
http://social.msdn.microsoft.com/Forums/en-US/category/uc
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
