Enterprise managed users (EMUs) must now prove ownership of their email addresses. Existing EMU account email addresses do not have to take this step unless the email address matches one on another GitHub.com account.
Enterprises with EMU accounts that have conflicts have received notification from GitHub regarding specific accounts that have an email address which also exists on another github.com account. Certain 3rd party applications may not work correctly until they have reverified their email address.
New EMU accounts will have their enterprise’s shortcode appended to their email address’s prefix until it is verified, or their administrator changes the email address to another value.
To verify an email address, follow the steps outlined in our documentation. EMU account email addresses are defined by your identity provider, and cannot be changed directly within GitHub. You will need to work with your IdP administrator to change your email address if necessary.
Some users may find that 3rd party GitHub Apps and OAuth apps may not handle the placeholder email correctly, resulting in missing data in these apps. In rare cases, Enterprise Owners may also find that their email provider does not support the “plus addressing” scheme in use. Developers can review our best practices for OAuth and GitHub App implementation, including the use of the id field when storing user reference data so that email address changes are not disruptive to a user’s apps experience.