SSL certificate not extending to subdomains or DNS misconfiguration

[perry]

hiya!

totally get what you are saying. i think this is the guide you need:

[Support Guide] Minimal downtime for a live site DNS migration

Last reviewed by Netlify Support - July 2025 IMPORTANT UPDATE While many details in this support guide remain valuable information, the best guide for a zero downtime DNS migration can be found here: However, there is still great information below and our support team will continue to link people to sub-sections of this support guide when they are relevant to someone’s particular situation or question. The trick with migrating a live site is all in DNS timing. Specifically, we can't get a…