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said by RiseAbove:

There is an answer. I found it after some work.

I got my Macbook air working with my companies AD which is hosted on MS Server 2k8 in a .local domain. I did it by turning off DNS multicasting.

I suggest checking out the website
hhttp://www.macwindows.com/TIP-Lion-dot-local-AD-disable-multicast.html

You also have to make sure you configure your Directory utility properly you can tell when you have it setup right when you go to the Directory Editor and it pulls up all your domains AD names.

Reader confirms that disabling multicast fixes Lion AD issue

Tuesday, January 24, 2012

Keith Adams confirmed at tip that suggests you can fix Lion problems with .local Active Directory domains by disabling DNS multicast:

Our issue was resolved by disabling MultiDNS broadcast. This tip worked like a champ for us! I had been struggling with the issue since 10.7 came out. Now this fix has resolved the issue of not being able to login as network users on 10.7 machines. We could always bind but not use network accounts. THANKS!!! We were running 10.7.2 on workstations and WS 2008 r2 on the DC. One odd thing was that when I did an upgrade install from snow leopard to Lion when it first came out everything worked fine for existing network accounts but new accounts could not be added.