itunes will not sync with outlook 2016

I am using office 365 and outlook 2016 on my laptop. I don't use icloud to sync my contacts or my email. I have always used outlook 2016 to sync my contacts and calendar. I restored my iPhone to like a brand new phone. I have updated my iTunes. I still can not sync my contacts and calendar like I used to. I don't have an exchange email in outlook. I use my gmail email like I always have done. Any advice on how to fix this issue? I appreciate it.