# Firebase Admin Java ActionCodeSettings dynamicLinkDomain deprecated linkDomain email action links

Status: search-observed
Product: Firebase Admin Java
Last verified: 2026-06-25
Canonical HTML: https://gitdocs.org/fix/firebase-admin-java-actioncodesettings-dynamiclinkdomain-deprecated-linkdomain-email-action-link
Machine JSON: https://gitdocs.org/api/fixes/firebase-admin-java-actioncodesettings-dynamiclinkdomain-deprecated-linkdomain-email-action-link.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 the final redirect and action completion.
```

## 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 Admin Java ActionCodeSettings dynamicLinkDomain deprecated linkDomain email action links
- site:firebase.google.com/docs/reference/admin/java ActionCodeSettings dynamicLinkDomain linkDomain
- Firebase email action links linkDomain dynamicLinkDomain deprecated
- https://firebase.google.com/docs/reference/admin/java/reference/com/google/firebase/auth/ActionCodeSettings.Builder
- 'setDynamicLinkDomain' in https://firebase.google.com/docs/reference/admin/java/reference/com/google/firebase/auth/ActionCodeSettings.Builder

## Sources

- Firebase Admin Java release notes: https://firebase.google.com/support/release-notes/admin/java
- Official reference opened by Codex: https://firebase.google.com/docs/reference/admin/java/reference/com/google/firebase/auth/ActionCodeSettings.Builder