I am working on a new lockdown group policy that will be used for our future Windows 2016 XenApp servers.

As this will be used for a lot of users, certain things will need to be locked down. For example the Settings need to be locked down in the same way as it possible with Control Panel.

I want to be able to manage what settings is visible in Settings with GPO.

We cannot allow users on a shared RDSH server to install windows update, add VPN connection, check what application is installed etc etc.
With Control Panel it was possible to hide certain settings, with Settings its all or nothing.

It was found that the c++ dll which was build using VS 2008 toolset was causing problem when deployed in Windows 2016 server . The dependency walker shows missing dll errors ( few are given below) which i suppose is misleading.

API-MS-WIN-CORE-LOCALIZATION-L2-1-0.DLL
API-MS-WIN-SECURITY-BASE-L1-2-0.DLL
API-MS-WIN-CORE-HEAP-L1-2-0.DLL
API-MS-WIN-CORE-DELAYLOAD-L1-1-1.DLL
API-MS-WIN-POWER-SETTING-L1-1-0.DLL

The same dll runs in Windows 2008 and windows2012 server .
When the dll was build with VS 2013 toolset every thing started working.
Re-building the existing dll in VS 2013 toolset and deploying has huge test effort.

so My suggestion is to provide support for dlls which are built in VS2008 toolset in Windows server 2016.

for details please check my question on MS forum below

https://social.technet.microsoft.com/Forums/projectserver/en-US/1ee4f19d-c7f2-4fd1-8586-0062357c1104/application-fail-to-run-on-windows2016-due-to-missing-dlls-apimswincore-?forum=WinServerPreview

When I hit start and type "Active", for example, the start menu correctly finds "Active Directory Users and Computers", "Active Directory Domains and Trusts", etc. on Windows 10 and Windows 2012R2.
that is NOT the case in Windows 2016 TP5. I have to type in "administrative" to get to "Windows Administrative Tools" and then run my mmc.

I don't know if it is a setting I should enable (maybe Cortana), or I have to wait for some indexing to finish (I've already waited waaay to long; besides Windows 2012R2 does not have this index-wait-time) for this comprehensive search to happen, but now the search function on start menu of Windows 2016 TP5 does not return all the relevant results as it does in other previous versions.

From what I've seen watching videos on RDSH has always been a huge problem. The video stucks, there are artifacts, and very few frames per second. I'm talking about YouTube videos (HTML5 / Flash Player) or third-party-players like VLC Media Player.
It would be great if you could investigate here so watching YouTube videos etc. will be possible on RDSH in the future! I known it is impossible to use graphics intensive applications on RDSH, but why are videos so slow?
I think many users would be glad if they could watch videos in RDSH sessions, this might become a part of our society and might even be important at work (where terminalservers might be used).

I don't expect it to work in fullscreen with 4k, but smooth HD 1080p fullscreen videos (without too high performance consumption ;)) would be great!

I have installed Remote Desktop Services on Windows Terminal Server 2016 TP5 servers.
I'm using a gateway, in order to connect from outside over HTTPS.
RemoteApp and Remote Desktop are working really good from Windows Computers Clients with the Remote Desktop Application (from the Windows Store) or with the default mstsc client.
When I use the same application for a Windows Phone 10 device, or with the Android or iOS application it doesn't work, even if I use the same wifi network as my laptop.
I can add the remote ressources, but I cannot connect to them with the same configuration as my laptop (correct credential, hostname, gateway address...). Same thing for Desktop connections.
The error seems to be the gateway, but I don't understand why it works with my laptop and not with any mobile phone.
On the Windows Phone, I get the following error message : "we couldn't connect to the gateway because of an error. If it keeps happening, ask your admin or tech support for help"