When you crawl file shares that are accessed through a domain-based Distributed File System (DFS) in SharePoint Server 2007 or SharePoint Server 2010, you experience poor performance

Symptoms

You access some file shares through a domain-based Distributed File System (DFS). When you crawl the file shares in Microsoft Office SharePoint Server 2007 or Microsoft SharePoint Server 2010, you experience poor performance. 

Resolution

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in WindowsTo resolve this problem, follow these steps: 

For SharePoint Server 2007

1. Apply the hotfix package 961749.
   For more information, click the following article number to view the article in the Microsoft Knowledge Base:
   
   

   961749 Description of the Office SharePoint Server 2007 hotfix package (Coreserver.msp): February 24, 2009
   
   

2. Enable the hotfix package. To do this, follow these steps:

   1. Click Start, click Run, type regedit, and then click OK.

   2. Locate and then click the following registry subkey:
      

      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office Server\12.0\Search\Global\Gathering Manager

   3. On the Edit menu, point to New, and then click DWORD Value.

   4. Type IgnoreLocalGroups, and then press ENTER.

   5. Right-click IgnoreLocalGroups, and then click Modify.

   6. In the Value data box, type 1, and then click OK.

   7. Exit Registry Editor.

   
   
   

Note We also recommend that you apply the Windows SharePoint Service 3.0 hotfix package that is described in the following Microsoft Knowledge Base article:

961750 Description of the Windows SharePoint Services 3.0 hotfix package (Sts.msp): February 24, 2009

For SharePoint Server 2010

1. Click Start, click Run, type regedit, and then click OK.

2. Locate and then click the following registry subkey:  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office Server\14.0\Search\Global\Gathering Manager

3. On the Edit menu, point to New, and then click DWORD Value.

4. Type IgnoreLocalGroups, and then press ENTER.

5. Right-click IgnoreLocalGroups, and then click Modify.

6. In the Value data box, type 1, and then click OK.

7. Exit Registry Editor.

Status

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