I posted a while back about seeing email addresses for registered users instead of a phone number (which few users input anyways). I tried to post the fix but totally botched it and never got the answer on here. I wanted to share this with other users who need a work-around for this. Bear in mind, I am a complete novice when it comes to ASCX files so this is not a complicated fix if you have access to the right files.

http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/20/threadid/246462/scope/posts/Default.aspx

Problem: When you edit a scheduled event and want to see who is enrolled, you scroll down to the Enrollment Settings in the Event Settings view and expand that view. No problems seeing this information but what is displayed is, honestly, not very useful. If you need to communicate with the users, you can search each person individually but, with how finicky user search is, this can be futile (and frustrating).It would be great if you could see the user's email address (since they need that to register anyways).

Solution:

You'll need root access to your site to see the files you need to change.

• Go to the Events module folder: [site]/DesktopModules/Events/
• Find the file "EditEvents.ascx" and make a backup copy.
• Edit the file in your favorite text editor program. Find this line of code:

<asp:BoundColumn DataField="Telephone" HeaderText="Phone"></asp:BoundColumn>

• Change that line of code to this (replace both "Telephone" and "Phone" with "Email"):

<asp:BoundColumn DataField="Email" HeaderText="Email"<>/asp:BoundColumn>

• I'm assuming you could change the DataField value to any valid DNN user data field (like "Username") but we only needed the email address.
• Save the file and upload back to the same directory (you renamed the original one as a backup, right?). Now, when you go under Enrollment Settings in the Event Settings view, the enrollees email address will display.

Viola!