Why I can'tedit my last name ?

The profile last-name field currently has a validation issue with certain special characters (such as Polish diacritics). This prevents saving the legal name exactly as it appears on the government ID.

Workaround and next steps:

1. Enter the last name without the Polish diacritic characters (for example, use plain Latin letters instead of ą, ć, ń, etc.) and save the profile.
2. Use this normalized version of the last name when registering and checking in for the exam. Other candidates have successfully taken exams this way even though their ID contains diacritics.
3. If the system still blocks saving the name or if there is concern about the mismatch, contact Credentials Support so the case can be reviewed and corrected on the backend:
   • Follow the guidance under How to contact support for certification issues and submit a support request to the Credentials Support team.

This is the only supported way to resolve legal-name issues for certification profiles when the self-service form rejects the last name.

References:

• Credentials support
• Managing your Microsoft Learn profile settings
• Microsoft Learn profile rejects valid last name with validation error - Microsoft Q&A