When trying to connect to an Exchange 2003 Server using PFDavAdmin I received the following error:
An error occur ed while trying to establish a connection to the Exchange server. Be sure that port 443 (for SSL) or port 80 (for non-SSL) can be reached. If you are connecting to public folders, be sure that the public folder store is mounted. If you are connecting to mailboxes and the progress bar shows a particular mailbox, be sure that user has at least one email address.
Exception: Failed to connect using secure URL: https://domain.local/ExAdmin/Admin/domain.local/public%20folders/ with error: The underlying connection was closed: Unable to connect to the remote server.. Failed to connect using unsecure URL http://domain.local/ExAdmin/Admin/domain.local/public%20folders/ with error: The remote server returned an error: (503) Server Unavailable.
This error gets generated if you have a proxy server configured in Internet Options. What caught me out however is PFDavAdmin only detects proxy settings on application lauch... not on connection. If you remove your proxy settings from Internet Options, then attempt to connect again using PFDavAdmin the same error will be reproduced as PFDavAdmin will continue trying to use your proxy settings.
1. Disable your proxy server or add an exclusion.
2. Close PFDavAdmin
3. Relaunch the PFDavAdmin application.