docs(auth): explain Microsoft OAuth password auth constraint - #220
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Document the Entra ID identifier and Platform password-reset delivery constraints that prevent Microsoft OAuth from being combined with password authentication.
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Summary
Documents why Microsoft OAuth cannot be combined with password authentication in the Built-in IdP. The explanation covers the Entra ID identifier claims and the Tailor Platform password-reset email delivery constraint described in Discussion #424.
Changes
emailclaim cannot reliably be used for user matching.preferred_username) is used and may not be a deliverable email address.