Your network has Microsoft Office Communications Server 2007 R2 installed. Active Directory maintains telephone numbers in various formats. All phone numbers display to Office Communications Server 2007 R2 users in E.164 format. You plan to migrate to Lync Server 2010. You need to ensure that the phone numbers display in the same format for Microsoft Lync 2010 users and Office Communications Server 2007 R2 users. Which action should you include in the migration plan?

A.
Run the Enterprise Voice Route Helper.

B.
Copy the RTCrtcab database.

C.
Copy the address book normalization rules.

D.
Copy the RTCdyn database.

Explanation:
If you customized Address Book normalization rules in your Office Communications Server 2007 R2 environment, you must migrate the customized rules to your pilot pool. Find the Company_Phone_Number_Normalization_Rules.txt file in the root of the Address Book shared folder, and copy it to the root of the Address Book shared folder in your Lync Server 2010 pilot pool. (http://technet.microsoft.com/en-us/library/gg412801.aspx)