Question:

How does the Call Visualforce page generate the Account Name displayed?

Answer:

If a user has access to an Account specified on a Call record, the Account Name is displayed on the Call Visualforce Page.

If a user does not have access to the Account specified on the Call record, the Entity_Display_Name_vod__c Formula field value pulls the Account Name from the appropriate Account to display on the Call Page.

Related Documentation:

N/A 

Thank you