We have DC set to auto import machines from certain AD OU's but it appears to have stopped working. 

If we do an AD synch it says it has successfully synched, but the machines don't appear. If we go to add computers manually we can see our domain on the left hand pane, but all we get is a spinning circle on the right hand box. 

We have recently updated to 10.0.433 so I think it may be this, but I can't be sure.

I've tried different credentials and nothing seems to work. However in SOM AD Synch settings it synchs to the domain and brings in any AD changes there. 

So it appears to be a problem adding computers. Any help would be appreciated!