Please be aware that our Ensignia webmail application expects to find IMAP folders (i.e. mailboxes) in a subdirectory of your home directory named 'Mail'.

That is, for an example person 'testuser': ~testuser/Mail/

If you store your IMAP folders in an alternate location, you may change the prefix in the Options -> Folder Preferences section of the webmail client, or please get in touch with your PoC for help with working around this limitation.