With the Contacts advanced setting enable-unique-agency-number enabled, you can ensure that agency numbers linked to an agency are unique to that agency.
This setting requires a True or False button.
This setting's default value is False. You can enter an agency number in use by another agency, and BriteCore will not prevent you from saving it.
Changing the default
To change the default, navigate to Settings > Advanced. Search for enable-unique-agency-number. Changing enable-unique-agency-number to True triggers BriteCore to alert you when you enter and attempt to save an agency number assigned to another agency.