When changing an Azure B2C email adress, do I need to change the UPN as well

问题

In Azure B2C with the GraphAPI I can change the email address of an existing user with a http PATCH command: https://azure.microsoft.com/nl-nl/documentation/articles/active-directory-b2c-devquickstarts-graph-dotnet/

"SignInNames": [
{
  "type": "emailAddress",
  "value": "demo@domain.com"
}

This works, and I can login with the new email address.

But this leaves the UPN at the old value, do I need to set the UPN as well, or is there no harm in having the UPN stay at the old email address?

回答1:

Yes, there is no need to update the UPN field.

回答2:

That is why (in my opinion) email address should never be the default. Instead choose username account option and email becomes a much easier field to deal with.

来源：https://stackoverflow.com/questions/36645576/when-changing-an-azure-b2c-email-adress-do-i-need-to-change-the-upn-as-well