See "Creating a profile": *https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles * If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.
Cached Exchange Mode was introduced in Outlook 2003 to give users a seamless online and offline Outlook experience.
It also insulates users from network latency and connectivity issues while they are using Outlook.
The views in outlook can become unresponsive causing it to not display the emails.
I have a Micosoft Outlook 2013 calendar account synched on my i Phone.
If the email has been moved but Outlook does not see it, I woudl move her mailbox to another database.