Windows Server 2008 Build 6003 Patched
A server reporting build 6003 simply indicates it has received certain post-January-2020 updates, typically via an Extended Security Update (ESU) program license.
Then check the last update date:
A server reporting build 6003 simply indicates it has received certain post-January-2020 updates, typically via an Extended Security Update (ESU) program license.
Then check the last update date: