RemoteApp window is too large or too small when you use RDP to run a RemoteApp application in Windows Server 2012 R2

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials

This article describes an issue that occurs when you use RDP to run a RemoteApp application in Windows Server 2012 R2. A hotfix is available to resolve this issue. The hotfix has a prerequisiteAdditional steps for configuration are required to enable this hotfix after the installation.

Symptoms


This issue occurs because the Dynamic dots per inch (DPI) sync setting for the remote desktop is not configurable. The Dynamic DPI sync feature automatically determines the DPI from the client side, and it ignores any server setting. Therefore, when the DPI of the client is much larger than the DPI of the server, this issue occurs. 

Note RDP represents Remote Desktop Protocol.

Resolution


To disable the feature, we have released a hotfix for Windows Server 2012 R2.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: Note The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


Prerequisites

To apply this update, you must have update 2919355 installed in Windows Server 2012 R2.

Registry information

To enable this hotfix, follow these steps:

Important
Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.
  1. In Registry Editor, locate and then click the following registry subkey:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server\WinStations
  2. Right-click WinStations, click New, and then click DWORD (32-bit) Value.
  3. Name the new registry entry as IgnoreClientDesktopScaleFactor.
  4. Double-click the IgnoreClientDesktopScaleFactor registry entry.
  5. In the Edit DWORD Value dialog box, type 1 in the Value data field, and then click OK.
  6. Exit Registry Editor.
Notes 

  • To enable the Dynamic DPI sync feature, set the IgnoreClientDesktopScaleFactor registry entry value to 0, or delete the registry entry.
  • You have to restart the server after the registry is changed.

Restart requirement

You may have to restart the computer after you install this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

Status


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

References


See the terminology that Microsoft uses to describe software updates.