Resolved
Due to a time zone error, this incident is not taking place until tomorrow.
Maintenance
The scheduled service degradation is now underway.
We'll post more updates as necessary or when the service degradation is complete.
Scheduled
On Wednesday, October 27, starting at 00:00 UTC, and continuing until 08:00 UTC (8 hours), Heroku will be denying traffic from all SSL Endpoints.
During this time, apps with SSL Endpoints that have custom domains pointing to SSL Endpoint DNS targets will experience outages for the duration of this incident.
For information on migrating off an SSL Endpoint still in use, please see https://help.heroku.com/W63FUHE5/how-do-i-manually-migrate-off-my-ssl-endpoint-add-on
We will provide an update when we begin and complete the service degradation.