- You have a server that is running Windows Server 2008 R2.
- You have the DFS Namespaces role service installed on the server.
- You have more than 1,000 folders in the domain-based namespace in Windows Server 2008 mode.
- There's a significant number of namespace servers.
- You have turned on Root Scalability Mode. It makes the problem more likely to happen.
- There are clients that make DFS management API calls, maybe because the DFS Management tools are used on the field DFS servers. For details see the More Information section.
Hotfix informationA supported hotfix is available from Microsoft Support. 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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.
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, contact 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, go to 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.
PrerequisitesTo apply this hotfix, you must have Service Pack 1 for Windows Server 2008 R2 installed.
Restart requirementYou have to restart the computer after you apply this hotfix.
Hotfix replacement informationThis hotfix does not replace any previously released hotfix.
To re-trigger reading the Active Directory configuration to re-create the missing folders, run the following command:
Background on LDAP Server resource shortageThere are two known issues in Windows 7 where clients might trigger DFS synchronization:
- KB2915094 Profile loading takes a long time due to full DFS namespace sync with PDC
- KB2937429 Group Policy Preferences items take a long time to apply because of full DFS namespace sync
There's a managed memory pool managed by the LDAP server that can hit limits for this query scenario. An article discusses this memory pool: How LDAP Server Cookies Are Handled.
For the purposes of domain-based DFS volumes, you can calculate MaxResultSetSize as follows to have a safe upper value for the LDAP cookie memory buffer:
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