I earned the AZ-900 certification while working at my previous company. The certificate was linked to their Microsoft account, so I currently dont have a copy of the certificate in my possession.

If you earned the AZ-900 certification while linked to your previous company's Microsoft account, you will need to access that account to retrieve your certificate. Here are some steps you can follow:

1. Contact your previous employer: Reach out to your former employer's IT department or the person responsible for managing certifications to see if they can provide you with a copy of your certificate.
2. Check your Microsoft Learn profile: If you have access to the Microsoft account used for the certification, sign in to Microsoft Learn and check your profile under the "Credentials" section to see if the certificate is listed there.
3. Submit a support request: If you cannot access the account or the certificate is not visible, you can submit a support request to Microsoft Credentials Support for assistance. They can help you verify your certification status and guide you on how to obtain a copy of your certificate.

For more information on how to access your certificates, badges, and transcripts, you can refer to the Microsoft documentation.