web

You’re offline. This is a read only version of the page.

News and Announcements icon

Power Platform CommunityForums Power Pages Sign-in “A user with t...

Power Pages

Suggested Answer

Sign-in “A user with this sign-in information already exists.” We had “Contact mapping with email”

(1) Share

Report

Report

Posted on by CU22052033-0

10

Hi,

Our Power Pages portal used Azure AD B2C as the identity provider. Some users had a sign–in problem with an error message: “A user with this sign-in information already exists.” We had “Contact mapping with email” set on.

One thing that seems suspicious is these users’ contacts had done a contact merge with email updates.

Categories:

I have the same question (0)

All responses Img

All responses (1)

Answers Img

Answers (0)

Suggested answer

rezarizvii 70 on at

Like (0)

Report
Copy link

Link copied!

Hi, hope you are doing well.

Users often experience this error when a record exists with the same email address in the contact table in Dataverse.

When users login to a site either through local authentication or external identities, a record gets created in the contact table for the corresponding user. During any subsequent logins, the site knows this contact belongs to this user. However, it seems that some users never signed in to your site but a contact record with their email address already exists in the contact table (most likely due to the contact merge that you mentioned). In such scenarios, the site does not know the record was created for this user and instead assumes a different user is trying to sign in with an existing email, hence the error they are receiving.

To fix this, you must delete the records from the contact table that have the same email address as users who have not yet signed up and let Power Platform create those records automatically when the user logs in.

If this reply helped you in any way, please give it a Like 💜 and in case it resolved your issue, please mark it as the Verified Answer ✅.

Was this reply helpful? Yes No

Join the conversation

Helpful resources

News and Announcements

Welcome to the Power Platform Communities

Quick Links

Subscribe to this forum!

Stay up to date on forum activity by subscribing.

Leaderboard > Power Pages

#1

#2

oliver.rodrigues 31 Most Valuable Professional

#3

Last 30 days Overall leaderboard

Featured topics

Solution to LinkedIn Authentication in Power Apps Portals

Welcome to the Power Pages forum!

Product updates

Microsoft Power Platform Community release plans