Ive used DejaOffice with Companionlink for Outlook for several years with my iPhone 4s/5s (office), as well as with my Galaxy 4s (personal). On the few occasions when I ran into problems there would always seem to be an update for Companionlink that solved the problem. DejaOffice and Companionlink make a great pair of programs for anyone wishing to keep their phone calendars and Outlook consistent!