Windows 2008 R2 connection broker

Question

I have a problem related to the fact that remote desktop client are not redirected to the disconnected sessionr when they try to reconnect.
I'm using a netscaler load balancer that uses redirection toker with the connection broker server.
I have made a small configuration test environment that reflect my origina configuration and the problem will exist event there.
All the servers are windows 2008 R2 with sp1 and all latest fix available using microsoft update.
The connection broker server is a domain controller server, and the terminal server are computer member of the domain.All the information are correctl registered by the connection broker database, but is seems that it works only with administative users.
The error that is reported
RD Connection Broker failed to process the connection request for user DOMAIN\USER.
Load Balancing failed OR Specified endpoint could not be found.HRESULT = 0x80070515.  
I have found no information about the error
0x80070515.
Here follow the connection broker information after
ClusterName = MYCLUSTER
NumberOfServers = 4
SingleSessionMode = 1
    SERVER :
    ServerName = TS018.mydomain.local ServerSingleSessionMode = 1 LoadIndicator = 655350000
    ServerIP = 10.10.4.18
    ServerWeight = 0
    ClusterName = MYCLUSTER
    NumPendRedir = 0
    No sessions on server TS018.mydomain.local
    SERVER :
    ServerName = TS020.mydomain.local ServerSingleSessionMode = 1 LoadIndicator = 655350000
    ServerIP = 10.10.4.20
    ServerWeight = 0
    ClusterName = MYCLUSTER
    NumPendRedir = 0
    NumberOfSessions = 1
        SESSION :
        UserName= mydomain\administrator    ApplicationType=     SessionState= 0
        CreateTime= 20150303101848.856647+060    DisconnectTime=
        ServerName= TS020.mydomain.local
        SessionID= 1
        ServerIP= 10.10.4.20
        TSProtocol= 2
        ResolutionWidth= 1920
        ResolutionHeight= 1080
        ColorDepth= 4
    SERVER :
    ServerName = TS019.mydomain.local ServerSingleSessionMode = 1 LoadIndicator = 655350000
    ServerIP = 10.10.4.19
    ServerWeight = 0
    ClusterName = MYCLUSTER
    NumPendRedir = 0
    NumberOfSessions = 2
        SESSION :
        UserName= mydomain\administrator    ApplicationType=     SessionState= 1
        CreateTime= 20150303101224.366219+060    DisconnectTime= 16010101000000.000000-000
        ServerName= TS019.mydomain.local
        SessionID= 1
        ServerIP= 10.10.4.19
        TSProtocol= 2
        ResolutionWidth= 1920
        ResolutionHeight= 1080
        ColorDepth= 4
        SESSION :
        UserName= mydomain\Flavio    ApplicationType= D:\Programmi\Seac\SeacCruscotto.exe    SessionState= 0
        CreateTime= 20150303121903.740379+060    DisconnectTime=
        ServerName= TS019.mydomain.local
        SessionID= 2
        ServerIP= 10.10.4.19
        TSProtocol= 2
        ResolutionWidth= 1920
        ResolutionHeight= 1080
        ColorDepth= 4
    SERVER :
    ServerName = TS017.mydomain.local ServerSingleSessionMode = 1 LoadIndicator = 655350000
    ServerIP = 10.10.4.17
    ServerWeight = 0
    ClusterName = MYCLUSTER
    NumPendRedir = 0
    No sessions on server TS017.mydomain.local
Second dump with the disconnected user and the same user that ties to reconnect and was redirected to a new session  instead to the disconnected session. You will find two user Flavio one in disconnected state (1) and one in connected state(0)
ClusterName = MYCLUSTER
NumberOfServers = 4
SingleSessionMode = 1
    SERVER :
    ServerName = TS018.mydomain.local ServerSingleSessionMode = 1 LoadIndicator = 655350000
    ServerIP = 10.10.4.18
    ServerWeight = 0
    ClusterName = MYCLUSTER
    NumPendRedir = 0
    No sessions on server TS018.mydomain.local
    SERVER :
    ServerName = TS020.mydomain.local ServerSingleSessionMode = 1 LoadIndicator = 655350000
    ServerIP = 10.10.4.20
    ServerWeight = 0
    ClusterName = MYCLUSTER
    NumPendRedir = 0
    NumberOfSessions = 1
        SESSION :
        UserName= mydomain\administrator    ApplicationType=     SessionState= 0
        CreateTime= 20150303101848.856647+060    DisconnectTime=
        ServerName= TS020.mydomain.local
        SessionID= 1
        ServerIP= 10.10.4.20
        TSProtocol= 2
        ResolutionWidth= 1920
        ResolutionHeight= 1080
        ColorDepth= 4
    SERVER :
    ServerName = TS019.mydomain.local ServerSingleSessionMode = 1 LoadIndicator = 655350000
    ServerIP = 10.10.4.19
    ServerWeight = 0
    ClusterName = MYCLUSTER
    NumPendRedir = 0
    NumberOfSessions = 2
       SESSION :
        UserName= mydomain\administrator    ApplicationType=     SessionState= 1
        CreateTime= 20150303101224.366219+060    DisconnectTime= 16010101000000.000000-000
        ServerName= TS019.mydomain.local
        SessionID= 1
        ServerIP= 10.10.4.19
        TSProtocol= 2
        ResolutionWidth= 1920
        ResolutionHeight= 1080
        ColorDepth= 4
        SESSION :
        UserName= mydomain\Flavio    ApplicationType= D:\Programmi\Seac\SeacCruscotto.exe    SessionState= 1
        CreateTime= 20150303121903.740379+060    DisconnectTime= 16010101000000.000000-000
        ServerName= TS019.mydomain.local
        SessionID= 2
        ServerIP= 10.10.4.19
        TSProtocol= 2
        ResolutionWidth= 1920
        ResolutionHeight= 1080
        ColorDepth= 4
    SERVER :
    ServerName = TS017.mydomain.local ServerSingleSessionMode = 1 LoadIndicator = 655350000
    ServerIP = 10.10.4.17
    ServerWeight = 0
    ClusterName = MYCLUSTER
    NumPendRedir = 0
    NumberOfSessions = 1
        SESSION :
        UserName= mydomain\Flavio    ApplicationType= D:\Programmi\Seac\SeacCruscotto.exe    SessionState= 0
        CreateTime= 20150303122059.706850+060    DisconnectTime=
        ServerName= TS017.mydomain.local
        SessionID= 2
        ServerIP= 10.10.4.17
        TSProtocol= 2
        ResolutionWidth= 1920
        ResolutionHeight= 1080
        ColorDepth= 4
Any idea ?
Thanks
Flavio

Answer 1

Hi Flavio,
It seems that you are facing issue with the RDCB load balancing between servers. Might possible that there is some wrong configuration happens which cause this issue. Still I like you to recheck all the configuration for your environment. Also as you said it
works with admin users, have you provide access to user to connect to the server?
From the error description it appears to be error 802 with specific code. To troubleshoot this issue, you can apply below steps and try.
1. Please try to limit single RDS session for TS user. 
2. Install RDS broker to separate server
3. Run NLB diagnose to check if any issue related to NLB
4. Use IP address redirection instead of token redirection
Also try to apply this policy settings.
Computer Configuration / Administrative Templates / Windows Components / Remote Desktop Services / Remote Desktop Session Host / RD Connection Broker / 
Use RD Connection Broker load balancing: Enabled
Configure RD Connection Broker server name: Enabled
And then apply gpupdate /force on every server and check the result.
Here is the article for related error only for reference.
Hope it helps!
Thanks.
Dharmesh Solanki
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]