Situation:

When initiating a Timbuktu Exchange session from Windows NT or 2000 or XP, you do not see the contents of a folder on your local machine in the Exchange window.

Solution:

1. Right-click on the folder that you are having problems with.
2. Select Properties.
3. In the General tab, click on the "Advanced..." button.
4. Make sure this is checked: "For fast searching, allow Indexing Service to index this folder."
5. In some cases if this is checked "Encrypt contents to secure data.", you can also experience the anomaly

Summary:

If "For fast searching, allow Indexing Service to index this folder." Is unchecked in the Advanced folder properties, you will not see the contents of a folder on your local machine in the Exchange window.