The fate of the hostname benefactorevents.wikimedia.org is in limbo as we work with the Fundraising Endowment team to figure out what the transition from Trilogy to new vendor Impact Flow should look like. We are currently waiting for specs from Impact Flow about what options we have for URL and hostname, and it's not clear whether we want to continue using the benefactorevents FQDN.
For now we should revoke the current benefactorevents.wikimedia.org SSL certificate.
Note: Both Trilogy and Impact Flow provide a SAAS events management platforms, which Endowment uses for managing donor events.