Hello Nguyen,
Thank you for posting question on Microsoft Windows Forum!
Based on your query of How to find all license information being previously purchased to re-configure the server. Well! Since the legacy Volume Licensing Service Center (VLSC) portal was officially retired, and all perpetual licenses, product keys, and relationship summaries have transitioned to the Microsoft 365 Admin Center. To retrieve your previously purchased licenses and download the necessary installation media for your server re-configuration. You can try the following steps.
- Go directly to the Microsoft 365 Admin Center.
- Sign in using your organization's business account (the Work or School Account associated with your ******@emsc.vn domain).
- In the left-hand navigation pane, expand the Billing menu and select Your products. (Please note: If you do not see the Billing option, click Show all at the bottom of the navigation menu to expand it.)
- At the top of the Your products page, click on the Volume licensing tab. Under the Downloads & keys or Contracts section, you will see your historical Open License agreements (including the one ending in 53787).
- For more information https://learn.microsoft.com/en-us/microsoft-365/commerce/licenses/vl-sign-in?view=o365-worldwide
For further reference.
Hope the above information is helpful! If it is. Free feel to hit "Accepted" for benefitting others in community having the same query too.