It appears you currently don’t support multiple custom domains. As you may know, recent changes to browser security (safari and soon to be chrome), 3rd party cookies are not allowed and it breaks your silent authentication. The fix is in many threads here is to use custom domains so the cookie is from the same domain and therefore accepted. However, we access the login from multiple domains and therefore need multiple custom subdomains. Is there any solution for this?
Hey there!
Let me discuss it with our product managers and get back to you shortly!
Hi @konrad.sopala - Just checking in to see if you had a chance to reach out to your product managers…
Yep but still don’t have an update on that front. Let me reping them
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I’ve just got an update from one of our product managers.
We haven’t prioritized working on supporting multiple custom domains just yet. However, third party cookies should not be a problem if you are using Universal Login for login, and refresh token rotation for renewing your access tokens.
Hi team! 
This is a heads-up that we’re hosting an Ask Me Anything (AMA) session 
on our new Multiple Custom Domains (MCD) capability. Our Platform Infrastructure Product Manager, Pawan Bhardwaj, will be live on June 25, 2025, from 9 AM to 11 AM PST 
to answer all your questions—from high-level strategy to specific technical implementation.
You can submit your questions from now until June 24 
, and we’ll provide detailed written answers during the live event.
If you have any questions about managing multiple brands 
, creating tailored login experiences 
, or simplifying your architecture with a single tenant 
, feel free to drop them in this thread. We look forward to your questions and seeing you there!
June 25 Auth0 Community Ask Me Anything: Multiple Custom Domains