TL;DR
If your app uses Internet Identity, update your identityProvider to https://id.ai/?feature_flag_guided_upgrade=true to ensure maximum compatibility and future-proof sign-in. No other changes are needed, and there is no deadline.
Migrate to the new Internet Identity provider (id.ai)
If your app uses Internet Identity for sign-in and is still pointing to one of the legacy providers:
identityProvider: "https://identity.ic0.app" // legacy 1
identityProvider: "https://identity.internetcomputer.org" // legacy 2
please migrate to https://id.ai.
All it takes is a single config change in your AuthClient setup:
identityProvider: "https://id.ai/?feature_flag_guided_upgrade=true"
This enables the guided upgrade flow and ensures your app is compatible with the latest Internet Identity experience — no other changes required.
There is no deadline for this migration, but making the change maximizes compatibility for users who might otherwise struggle with custom browsers or password manager configurations.
One line. Maximum assistance for your users. Future-proof sign-in.