A content crawl is slow when you crawl the contents of a Microsoft SharePoint site from a different Office SharePoint Server 2007 farm.
Note A one-way trust is set up between the SharePoint site and the Office SharePoint Server 2007 farm.
To resolve this issue, apply the following hotfix updates:
2512780 Description of the Windows SharePoint Services 3.0 hotfix package (Sts-x-none.msp): April 26, 2011
2512781 Description of the Office SharePoint Server 2007 hotfix package (coreserver-x-none.msp): April 26, 2011
Registry key information
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 Windows
After you install the hotfix packages, follow these steps to enable the hotfix:
Click Start, click Run, type regedit in the Open box, and then click OK.
Locate and then click the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office Server\12.0\Search\Global\Gathering Manager
On the Edit menu, point to New, and then click DWORD (32-bit) Value.
Type DoNotResolveAuthor, and then press ENTER.
In the Details pane, right-click DoNotResolveAuthor, and then click Modify.
In the Value data box, type 1, and then click OK.
Exit Registry Editor.
Note After the registry key is added, SharePoint will not try to resolve an author name to the author’s Security Identifier (SID) in Activity Directory Domain Service (AD DS) if the author is not in the SharePoint user list. Therefore, the lists that have author only permissions may be missing after a content crawl.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.