Windows server 2012 stops accepting simple remote desktop clients

Question

Hi, I have a Standard Windows 2012 Standalone server as host for several Virtual machines ( f.e. AD and Exchange)because I do not use a keybord ar mouse for that server I always use simple RD to maintain that host.
Since sunday I cannot connect anymore. I checked Rd configuration, network and Client ( W7). Nothing to find why.
Se below the result of checking the host:
Windows PowerShell
Copyright (C) 2012 Microsoft Corporation. All rights reserved.
PS C:\Users\Administrator> get-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server'-name "fDenyT
Connections"
fDenyTSConnections : 0
PSPath             : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal S
                     erver
PSParentPath       : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control
PSChildName        : Terminal Server
PSDrive            : HKLM
PSProvider         : Microsoft.PowerShell.Core\Registry
PS C:\Users\Administrator> get-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server\WinStations\R
P-Tcp' -name "UserAuthentication"
UserAuthentication : 0
PSPath             : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal S
                     erver\WinStations\RDP-Tcp
PSParentPath       : Microsoft.PowerShell.Core\Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Terminal S
                     erver\WinStations
PSChildName        : RDP-Tcp
PSDrive            : HKLM
PSProvider         : Microsoft.PowerShell.Core\Registry
PS C:\Users\Administrator> get-netfirewallrule -DisplayGroup "Remote Desktop" | format-table Name, Enabled -autosize
Name                          Enabled
RemoteDesktop-UserMode-In-TCP    True
RemoteDesktop-UserMode-In-UDP    True
So everything seems to be correct.
I do not have installed Remote desktop server/services etc. because ther is no need to.
I did not change anything on the host, no updates etc short before the problem occurred. Even not on the clients
Where to look to find the solution. On internet I could not find it, only that what I already checked.

Answer 1

Hi,
Thanks for your comment. Sorry for late response.
How many users you are trying to remote desktop at a time?
I am asking here because from your troubleshooting you have done all your steps but seems you are moving out for more session connection and that’s why you can’t connect.
Because by default server only provide 2 remote session at a time and that is also for administration purpose. So if you are trying to get more than 2 remote session for your server then you need to install RD Licensing server, activate the server, purchase
RDS CAL (per user or per Device) as per your requirement and then configure them. After this you can get more connection.
Please clarify and review this point 1 under this KB 2477176 article (only for reference).
Hope it helps!
Thanks.
Dharmesh Solanki
TechNet Community Support
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