Hello, @Sibba Sailor !
Do I need to bring my own license if I migrate Windows Server 2003 to Azure?
Yes, you will need your own Windows Server 2003 license. You can read more about Windows Server 2003 on Azure here:
https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/run-win-server-2003
This is the process for migrating Windows Server 2003 to Azure:
https://learn.microsoft.com/en-us/azure/migrate/prepare-windows-server-2003-migration
I hope this has been helpful! Your feedback is important so please take a moment to accept answers.
If you still have questions, please let us know what is needed in the comments so the question can be answered. Thank you for helping to improve Microsoft Q&A!