# \#account-link

**URL:** https://community.auth0.com/tag/account-link/2583.md

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## [  Migrating to Auth0 from another OIDC provider. linking existing users when Apple relay emails don't match](https://community.auth0.com/t/migrating-to-auth0-from-another-oidc-provider-linking-existing-users-when-apple-relay-emails-dont-match/202225)

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**Author:** [@Samama251251](https://community.auth0.com/u/Samama251251)\
**Replies:** 1\
**Last updated:** [August 3, 2026, 6:52pm UTC](https://community.auth0.com/t/migrating-to-auth0-from-another-oidc-provider-linking-existing-users-when-apple-relay-emails-dont-match/202225 "2026-08-03T18:52:12Z")

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We’re migrating a Node/Express app from another OIDC identity provider to Auth0. Sessions are server-side (express-session + Postgres), and our users table currently keys off the old provider’s OIDC sub. Our plan is t…