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Azure AD B2C Email Address Question

Tarkowski, Michael (M.) 156 Reputation points
2022-06-02T15:04:44.833+00:00

When a new user completes the signup user flow for the 1st time using Azure AD B2C setup as out-of-the-box configuration (no customer custom policies added).
 - What characters are allowed for email addresses?
 - What characters are not allowed for email addresses?
 - What is minimum and maximum character length allowed for each portion of the email address?
 - Is RFC 5322 and 5321 supported for email addresses?

Microsoft Security | Microsoft Entra | Microsoft Entra External ID

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  1. Anonymous
    2022-06-06T21:38:30.38+00:00

    Hi @Tarkowski, Michael (M.) , please review this document about user attributes. Since email is a string you could have 256 characters max. Min would be anything greater than 0. This document references all the character constraints for different resources. You can use Alphanumerics, hyphens, and underscores as long as you start with a letter or number. And yes, RFC 5322 and 5321 are supported. Please let me know if you have any questions!

    If this answer helped you please mark it as "Verified" so other users can reference it.

    Thank you,
    James

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