In Exchange we have a contact with an email address of firstname.lastname@example.org. This has a display name of "Global Name".
We have a user who has created a contact with the same email address (email@example.com) but with a different display name of "Local Name".
The problem we are seeing is when they send to the address firstname.lastname@example.org, they use their local contacts so it is displayed as "Local Name (email@example.com)". Yet when the email is received, it is displayed as "Global Name (firstname.lastname@example.org)".
This display name change has caused some confusion and I am wondering if it is possible to make it so the local contacts display name is always shown.