Hello,
Thank you for posting in Microsoft Community forum.
Based on the description, I understand your question is related to upgrade 2003.
Here are a few things to check before doing upgrade:
- Type system in search bar and press enter, check system type, if it is 64-bit or 32-bit system. Starting from Server 2016, systems are all x64-based, a 32-bit system cannot upgrade to x64.
- Run below command in cmd to check the version you can upgrade to : DISM /online /Get-CurrentEdition DISM /online /Get-TargetEditions
- If you are using Server 2003 currently, it is very important to check if your current hardware meet the requirements for Server 2008/ Server 2022:
Note: you can also find introduction about IIS on server 2008 in first website:
Install Windows Server 2008 and Windows Server 2008 R2 | Microsoft Learn
Hardware requirements for Windows Server | Microsoft Learn
Have a nice day.
Best Regards,
Molly