If a document is stored via drag and drop to the Windows Explorer Client some of the index fields are greyed out in the store dialog

Behavior:
If a document is stored via drag and drop to the Windows Explorer Client some of the index fields are greyed out in the store dialog.

Solution:
The fields which are grayed out in the store dialog, are the fields which were used for the structure of the tree view in the Windows Exporer client. If you drag and drop the documents to one of these folders, this index fields will be greyed out and can't be changed in the store dialog.