Multiple RDP (Remote Desktop) sessions in Windows 10

Option 1 - Modifying termsrv.dll

To have concurrent user sessions working in Windows 10, you need to make small changes to termsrv.dll file. This file is located in C:\Windows\System32 folder. Before modifying termsrv.dll for the first time, you need to take ownership and assign yourself full permissions. You also need to stop Remote Desktop service (TermService) if it's running.

DLL files can be modified using any HEX Editor (for example Tiny Hexer). You can do this yourself by replacing strings shown below, or just download patched versions from this page.

Windows 10 x64 v1703 - Creators Update (April 2017)

Windows 10 Creators Update (1703 -  Redstone 2) updates termsrv.dll to version 10.0.15063.0. To get back concurrent remote desktop connections, make following changes:

Find:

39 81 3C 06 00 00 0F 84 53 71 02 00

replace with:

B8 00 01 00 00 89 81 38 06 00 00 90

Patched version can be download from here. Original, v10.0.15063.0 file can be found here.


Older Windows 10 versions

Windows 10 x64 Threshold 2 (November 2015)

Windows 10 Fall Update (also called "Threshold Wave 2 Update") updates termsrv.dll to version 10.0.10586.0. To get back concurrent remote desktop connections, make following changes:

Find:
39 81 3C 06 00 00 0F 84 3F 42 02 00

replace with:
B8 00 01 00 00 89 81 38 06 00 00 90

Patched version can be download from here. Original, v10.0.10586.0 file is here.

Windows 10 x64 RTM (August 2015)

termsrv.dll file version 10.0.10240.16384.

In termsrv.dll find:
39 81 3C 06 00 00 0F 84 73 42 02 00

and replace it with:
B8 00 01 00 00 89 81 38 06 00 00 90

Patched version can be downloaded from here. Original, untouched version of termsrv.dll v10.0.10240.16384 can be downloaded from here.


Option 2 - RDP Wrapper

Instead of modifying termsrv.dll file you can use RDP Wrapper which acts as a middleman between Terminal Services and Service Control Manager. This way you don't need to touch termsrv.dll file. Actually, if you already modified your termsrv.dll file, you need to revert to the original version before using this method.

Download and extract RDPWrap-v1.6.1.zip (or newer), then run install.bat as admin. After installation is completed, run RDPConfig.exe. If all items under Diagnostics are green, you should be good to go.

If "Listener state" is "Listening [not supported]", you will need to update the wrapper's configuration (.ini) file.

With the latest version of RDP Wrapper you no longer need to update rdpwrap.ini manually. Simply run update.bat and everything will be done automatically.

May 2017
Windows 10 64bit



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