Problem + Steps to reproduce:
Take a folder (SPFolder object) in a SharePoint list (or Document library). Make a copy of the folder in any of the following methods:
- Explorer view.
- SharePoint Designer.
- Code: SPFolder.CopyTo(string path).
Start an incremental crawl to index that folder. The folder will not get indexed.
Even if you add new items (or documents) to the copied folder, it will not get indexed with incremental crawl.
Workaround:
If you want to make sure it is being indexed, start a full crawl, and it will get indexed as expected.
The issue was reported to Microsoft and may be addressed in the next cumulative update.
-- My name is Itay Shakury, and I’m a SharePoint consultant --