Outlook4Gmail supports synchronizing of multiple Google accounts. You are able to define and synchronize a set of address books in real-time. When you select two-way synchronization, the data will be read in two iterations and contacts will be synchronized in all address books ? both for Outlook and Gmail accounts.
You could automate synchronization with help of "Real Time Items Update" option. By enabling this option, any contact details update will start synchronization automatically in background. Another unique feature is automatic check-up for contact?s updates by time interval. All you need is to configure the settings just once and that would be enough for the add-in to update your contacts information automatically without any efforts from user.
Apart from synchronization of Google contacts and calendars, the add-in synchronizes Outlook contacts and appointments to Google as well.