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Friday, April 29, 2011

RDS Host: Requested session access is denied

A user trying to connect to a RDS host 2008 R2 (workgroup environment) got the error message "requested session access is denied". The user is member of the local remotedesktop user group and
the permission "Allow logon via Remotedesktop servies" is granted.
When granting administrative rights the issue will not appear.

Solution: Remove the /admin parameter in the remote desktop connection. The user was trying to connect to the RDS host console session. This of course will not work with user rights.

Hardware: Bluescreens on Gigabyte GA-P67A-UD3-B3 0x00000050 / 0x000000109

A system with a motherboard Gigabyte GA-P67A-UD3-B3 and 12 GB RAM (modules: 2x KVR1333D3N9K2/8G and 2x KVR1333D3S9/4G) runs into blue screens reproducable when in full load:


Doing changes on the memory timings (CL), frequency (1333 Mhz) or voltage did not solve this issue. A defective hardware could also be excluded.

Lets take a look at the placement of the dimms:
Slot 0 : 2GB module
Slot 1 : 4GB module
Slot 2 : 2GB module
Slot 3 : 4GB module

The change to the following placement solved the issue:
Slot 0 : 4GB module
Slot 1 : 2GG module
Slot 2 : 4GB module
Slot 3 : 2GB module

System running stable now.

Saturday, April 23, 2011

Hyper-V remote connection: delayed keystroke

When a virtual machine is controlled via Hyper-V manager, the user can run ínto a keystroke delay. This occured on one of our virtual Windows Server 2008 R2 servers with Exchange 2010 SP1.
This problem only occurs on direct access from HyperV manager. When using RDP connection this issue will not occur.
New installation of integration services did not solve the problem.

Following workaround did solve the problem:

- shut down the virtual machine
- decrease assigned cpu cores from 4 to 1
- start virtual machine and shut down again
- increase assigned cpu cores back from 1 to 4

Monday, April 18, 2011

RemoteFX: GeForce GTX 465 / GTX 560Ti / GeForce 310

Following GPUs have been tested successfully with RemoteFX using latest Nvidia drivers:

Nvidia GeForce GTX 465 1GB
Nvidia GeForce GTX 560Ti 1GB
Nvidia GeForce 310 1GB

Tuesday, April 12, 2011

Exchange 2010 OWA : blank screen on logon

After you installed Exchange 2010 (with or without SP1) out-of-the-box, you might run into a blank screen on Outlook Web App login.
Outlook Web App redirects to the following URL:


Reason :
The exchange installer does not install all necessary prerequisits.

-Open the windows powershell (run as administrator)
-Enter the following commands:
1. Import-Module ServerManager
2. Add-WindowsFeature NET-Framework,RSAT-ADDS,Web-Server,Web-Basic-Auth,Web-Windows-Auth,Web-Metabase,Web-Net-Ext,Web-Lgcy-Mgmt-Console,WAS-Process-Model,RSAT-Web-Server,Web-ISAPI-Ext,Web-Digest-Auth,Web-Dyn-Compression,NET-HTTP-Activation,RPC-Over-HTTP-Proxy -Restart

OWA will now run properly again.

Friday, April 1, 2011

Remote Desktop Easy Print: hieroglyphics in printing

When using Remote Desktop Easy Print with Server 2008 R1 and R2 it can result in an error of printing hieroglyphics, wrong font and size aswell as strange symbols.

This error will only occur on client systems of Windows XP, when using Vista or Windows 7 this issue will not occur.

Possible Workarounds:

1. Use Vista or Windows 7 clients
2. Copy the document using \\TSCLIENT mapping to the local computer and print the document from the local system
3. When possible, configure the printer as a network printer