2012 R2 - Universal Termsrv.dll Patch Windows Server

8B 81 D8 00 00 00 83 F8 02 7C ...

Introduction: The Built-In Limitation of Windows Server 2012 R2 Windows Server 2012 R2 remains a workhorse in countless data centers and small business server rooms. It offers stability, performance, and a familiar management interface. However, like every non-RDS (Remote Desktop Services) edition of Windows, it comes with a hard-coded limitation: only two concurrent Remote Desktop (RDP) sessions are allowed. universal termsrv.dll patch windows server 2012 r2

The patch locates and changes a conditional jump instruction ( JNZ , JE ) to an unconditional jump ( JMP ) or alters the comparison value (e.g., changing a cmp eax, 2 to cmp eax, 9999 ). Specifically, for Server 2012 R2, the known patch targets the following hex pattern: 8B 81 D8 00 00 00 83 F8 02 7C