Event ID 16704 — QoS Policy Update

Applies To: Windows Server 2008 R2

Quality of Service (QoS) policies are applied to a user or computer account by using Group Policy. The QoS policies are applied to a Group Policy object (GPO), which is then linked to an Active Directory container, such as a domain, site, or organizational unit (OU), that contains the user or computer account.

Event Details

Product: Windows Operating System
ID: 16704
Source: Tcpip
Version: 6.1
Message: A computer QoS policy exceeds the maximum allowed name length. The offending policy is listed under the computer-level QoS policy root key, with index %2.


Change QoS policy to meet minimum requirements

A QoS policy must adhere to the following minimum requirements; otherwise, the policy will be ignored:

  • A DSCP value or a throttle rate must be specified (only one of the two is required).
  • The policy name must contain at least a single character (it cannot be blank).
  • An application name specified in a policy must be exactly the name of the executable file or the exact file system path to the file. Files stored on a network share or network mapped drive are not supported.

You must be logged on as an administrator or belong to the Administrators group to complete this procedure.

To change any of these QoS settings:

  1. Click Start, point to All Programs, click Accessories, right-click Command Prompt, click Run as administrator, click Continue, type gpedit, and then press ENTER.
  2. In Group Policy Management Editor, click Local Computer Policy, click Windows Settings, right-click Policy-based QoS, right-click the policy you want to edit, and then click Edit existing policy.
  3. Change the QoS policy settings to meet the minimum requirements.

Note:  You can use Group Policy Management Console to change these settings on more than one computer.


To verify that the advanced QoS settings are being applied:

  • Update Group Policy on your computer
  • Ensure that the event in question is not in the event log

To verify the resolution of events related to QoS policies:

  1. Click Start, point to All Programs, click Accessories, right-click Command Prompt, click Run as administrator, and then click Continue.
  2. Type gpupdate /force, and then press** **ENTER to confirm that the event is no longer generated.

To view QoS events:

  1. Click Start, click Control Panel, click Administrative Tools, and then click Event Viewer.
  2. In the console tree, expand Windows Logs, and then click System.

QoS Policy Update