FBSender fails with "0x80004005 (Unspecified error)" (4325290)

The following entries can be seen in FBSender.log:

07/04 18:29:51:550 | Collector.cpp(208)             | 2228 | Entering CCollector::GetFolders
07/04 18:29:51:566 | Collector.cpp(250)             | 2228 | Folder present: EX:/o=Org/ou=OU1
07/04 18:29:51:566 | Collector.cpp(250)             | 2228 | Folder present: EX:/o=Org/ou=OU2
07/04 18:29:51:566 | Collector.cpp(250)             | 2228 | Folder present: EX:/o=Org/ou=OU3
07/04 18:29:51:566 | Collector.cpp(253)             | 2228 | Cookie not completed: EX:/o=Org/ou=OU3
07/04 18:29:51:566 | Collector.cpp(635)             | 2228 | Incompleted cookie. Folder name: EX:/o=Org/ou=OU3
07/04 18:29:56:706 | Collector.cpp(645)             | 2228 | Error:  Unspecified error 0x80004005
07/04 18:29:56:706 | Collector.cpp(208)             | 2228 | Exiting CCollector::GetFolders
07/04 18:29:56:706 | Collector.cpp(155)             | 2228 | Exiting CCollector::Initialize

QCS is unable to access one of the Public Folders.

Exclude the problematic Public Folder from processing by implementing the AdminGroupBlacklist registry value.

Disclaimer:
Quest does not provide support for problems that arise from improper modification of the registry. The Windows registry contains information critical to your computer and applications. Make sure you back up the registry before modifying it. For more information on the Windows Registry Editor and how to back up and restore it, refer to Microsoft Article ID 256986 “Windows registry information for advanced users”: http://support.microsoft.com/default.aspx?kbid=256986

1. Go to your QCS machine.
2. Close the QCS console.
3. Run Registry Editor.
4. Locate the following key:
 
    On a 32-bit OS: HKLM\Software\Aelita\AelitaCollaborationServices
    On a 64-bit OS: HKLM\Software\Wow6432Node\Aelita\AelitaCollaborationServices
  
5. Add a new Multi-String Value "AdminGroupBlacklist" (also see the screenshot attached to the article).
6. Edit the "AdminGroupBlacklist" and add the folders to be excluded from processing, one item per line. For example:

    EX:/o=Org/ou=OU2
    EX:/o=Org/ou=OU3
 
7. Restart the 'Quest Collaboration Services Synchronization Service' to apply the changes.