You are the Office 365 administrator for your company.
The company uses Microsoft Lync Online and wants to customize Lync meeting invitations.
You need to identify the URLs that may NOT be changed on the Lync meeting invitations from the Lync admin center.
Which two URLs may NOT be changed? Each correct answer presents part of the solution. following optional items in the body of the meeting invitation: https://technet.microsoft.com/en-us/library/gg398638(v=ocs.15).aspx

A.
Help URL

B.
Company URL

C.
Meeting URL

D.
Legal URL

E.
Logo URL

Explanation:

You can customize meeting invitations sent by the Online Meeting Add-in for Lync 2013 by including the
Note:
To Customize the Meeting Invitation by using Lync Server Control Panel
References: