In this article, we’ll go over a variety of ways to achieve synchronization and/or two-way syncs through Gmail and Outlook. To avoid double bookings, it’s important to integrate calendars across your many accounts. This task seems simple enough on the surface, but things can get complicated in a hurry when you’re working with two email accounts (or worse, two separate email clients all together). For busy salespeople, keeping an up-to-date calendar is imperative for managing opportunities efficiently.