So I'm not really sure how to troubleshoot, but this is what I'm seeing:
At least 1 user has information in the Lync contact card that is out of date. The person's office phone number was updated in Active Directory over a week ago, but the number in Lync still shows the old number. If I look at the Address Book within Outlook, it shows the new number. I tried redownloading the address book files (by deleting the old ones) on my Lync client but it is still showing the old number. Running Update-CsAddressBook did not help either.
When trying to do a search on a Lync Phone edition device I'm getting "Incomplete results. Please search later." It does seem like there is something wrong with the address book, but I'm not really sure what?