Can Call Reports be created offline in Outlook Add-In?

Hi- we're a US company and have sellers on the ground in China.  They are frequently complaining about the speed and reliability of using CRM via a web browser.  I'm investigating how they might be able to utilize the offline component in the Outlook add-in and struggling to understand how it might work for them.  Namely, creation of Call Reports offline.  Is this possible to perform using the offline capabilities of CRM in Outlook?

Cheers!