Changes to HTTP DCV
After October 21, 2021, you will no longer be able to issue new wildcard certificates or validate existing certificates up for renewal using HTTP Domain Control Validation (DCV).
If you are affected by this change, you should have also received an email from Cloudflare.
What is affected?
If your application uses a full setup or already uses another method of DCV, you do not need to make any changes. Cloudflare will complete TXT DCV on your behalf
SSL for SaaS
If you do not make a change, Cloudflare will automatically change your DCV method to TXT and send your customer tokens to you 30 days before the certificates expire.
Why is this change happening?
The Certificate Authority/Browser forum using HTTP-based validation to prove ownership before issuing wildcard certificates. As a result of that decision, will be implementing the change on November 15, 2021.