Windows Server 2003/5.2.3790.1711.dnsrv r2 beta.041203-1815
From BetaArchive Wiki
- Most probably the first R2 build leaked through Connect.
- Known to exist in x86/x64 isos.
- The ISOs from MS Connect were also released by WiNBETA.
- This possibly came with Server 2003 SP1 build 3790.1289.
- A quick google search tells me this is R2 beta1.
This build got re-leaked on June 6, 2015.