By default, Windows Server 2016 allows only one active Remote Desktop session per user (or two administrative sessions). This patch modifies the termsrv.dll file to remove the single-session limit, allowing multiple concurrent RDP sessions with the same or different user accounts without a proper RDS License Server.
For Windows Server 2016 (most builds 14393–17763), search for this sequence: termsrv.dll patch windows server 2016
The termsrv.dll patch for Windows Server 2016 remains a powerful, time-tested tool for breaking the two‑session RDP shackles in non‑production environments. It is a testament to the community's desire to bypass artificial restrictions for legitimate lab, testing, or legacy use cases. By default, Windows Server 2016 allows only one
Right-click termsrv.dll -> -> Security -> Advanced . Change the Owner to your administrator account. termsrv.dll patch windows server 2016