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The available information does not state that an MS-900 voucher can be converted or reused for AB-900. Vouchers and discount offers are generally tied to specific exams and terms, and when exams are retired or replaced, only explicitly announced extensions or mappings apply.
The documented extensions relate to:
- Extending retirement dates for older certifications and related vouchers in 2020–2021.
- Specific event- or sweepstakes-based vouchers that clearly list which exams they apply to (for example, AI Challenge vouchers explicitly list AB-900 as eligible, and Ignite Challenge vouchers apply to any Pearson VUE–delivered Microsoft Certification exam).
There is no documented statement that a Virtual Training Day voucher originally intended for MS-900 can be used for AB-900.
To resolve this scenario, certification support must confirm whether the specific voucher can be reassigned or replaced for AB-900 based on its terms and issuing campaign. Use the certification support channel for exam and voucher issues:
- Submit a request via the certification support page (for example, as indicated by “Contact certification support” and similar guidance in the references).
References:
- An Important Update on Microsoft Training and Certification
- How to redeem your Microsoft Ignite Challenge Sweepstakes prize
- How to redeem your Microsoft Credentials AI Challenge Sweepstakes prize
- Exam frequently asked questions
- I attempted AZ 900 exam on 9th April and had scored 900 marks, yet I'm unable to find my certificate. - Microsoft Q&A
- Can't see my completed exam certificate - Microsoft Q&A