Random emails not syncing w/ Outlook 2016 via Active Sync

Random emails not syncing w/ Outlook 2016 via Active Sync

I am using Exchange Active Sync w/ Outlook 2016 (Office 365) on a Win 7 Pro computer w/ my own domain name. For the most part it works very well, but over the last week I've had random emails that do not show up in Outlook. They will appear on my phone (that's how I discover they've been sent) and in my inbox on mail.zoho.com, but they simply aren't there on Outlook. Any ideas whey this is doing this and what I can do to fix it?