iOS BYOD – Microsoft Company Portal iOS MDM enrollment issue – Automatically attaches incorrect Exchange account

Regards,

I am experiencing the following issue in our iOS BYOD environment and need assistance from Support.

During Company Portal enrollment (MDM profile installation), only one specific user account a native iOS Exchange account automatically created, even though no email configuration profile or policy is assigned in Intune.

The automatically created Exchange account contains incorrect settings and cannot sync. It also cannot be edited or removed individually — the only way to remove it is by deleting the entire MDM profile, which would break access to all Microsoft corporate apps on the device.

Important observations:

• The issue occurs only with this one user account in the tenant. Using any other user on the same iPhone does not create an automatic Exchange account.
• On a different iPhone, signing in with this same problematic account results in the same unwanted Exchange account being created automatically. → This confirms the issue is user‑based, not device‑based.
• At the bottom of the native iOS Mail account settings page, it shows: “These settings are installed by the profile ‘Eas Profile – outlook.office365.com<myname> @<mycompanyname>.hu”

In Intune admin center:

• There is no iOS Email profile assigned.
• There are no Custom (.mobileconfig) profiles.
• On the affected device, the Device configuration list is completely empty. → This strongly indicates that Intune is NOT installing this Exchange account.

Next question might be: What could cause iOS (during BYOD User Enrollment) to automatically create a native Exchange (EAS) account only for a specific user, when no email profile exists in Intune and other users do not experience this behavior?

Thank you for your help!