Error ID 80004005 Occurs When Viewing Public Folders in Exchange System Manager

When you are using Exchange System Manager to view public folders, when you attempt to expand the Public Folders tree, you may receive the following error message:

This issue can occur if the default Web site on this server does not contain a blank Host header.

To resolve this issue, follow these steps:

1. Click Start, point to Programs, click Administrative Tools, and then click Internet Services Manager.
2. In the left pane, expand the server.
3. Right-click the Web site and click Properties.
4. Click the Web site tab, click the Advanced button, and then click Add.
5. Enter the TCP port number that you are using for this Web site (this number is 80 by default), leave the Host header name box blank, and then click OK.
6. Click OK.

NOTE: The Host header name box must be blank; if you enter a value in this box, you may receive the error message that is described in the "Symptoms" section. You do not need to restart the default Web site, but you may have to refresh the view in Exchange System Manager for the change to be registered.