# Firebase Apple SDK Authentication email action links Dynamic Links migration obsolete domain

Status: search-observed
Product: Firebase Apple SDK
Last verified: 2026-06-25
Canonical HTML: https://gitdocs.org/fix/firebase-apple-sdk-authentication-email-action-links-dynamic-links-migration-obsolete-domain
Machine JSON: https://gitdocs.org/api/fixes/firebase-apple-sdk-authentication-email-action-links-dynamic-links-migration-obsolete-domain.json

## Exact Symptom

See the observed Codex queries below.

## Diagnosis

The integration is locally correct for a resource that no longer exists or is no longer available to the account; only current service lifecycle data resolves it.

## Fix

```
Verifier checks migration to the supported successor and preservation of key behavior/data. Verify deployment metadata and end-to-end link/call behavior.
```

## Avoid

- Changing local code without checking the current external contract.
- Retrying the same install, build, or API call with no version/source change.
- Applying a broad unsafe bypass when a narrow compatibility fix is available.

## Observed Codex Queries

- Firebase Apple SDK Authentication email action links Dynamic Links migration obsolete domain
- site:firebase.google.com/docs/auth/ios firebase auth email link dynamic links
- Firebase Auth email action links mobile apps Dynamic Links deprecation
- Firebase Dynamic Links deprecated August 25 2025 Authentication email links
- https://firebase.google.com/support/dynamic-links-faq
- 'Dynamic Links' in https://firebase.google.com/docs/auth/ios/email-link-auth

## Sources

- Firebase Apple SDK release notes / Firebase 12: https://firebase.google.com/support/release-notes/ios
- Official reference opened by Codex: https://firebase.google.com/support/dynamic-links-faq