We cannot sync Outlook with Gmail in the basic version of Gmail, to do so we need to use the premium version of Gmail. Wrong settings can restrict the syncing process even if you are on a premium version of Google account. Only paid Google Account can continue the syncing services. Google has discontinued the sync services in 2012 that prevent free syncing. Google discontinued providing free sync services Why Outlook for Mac not Syncing with Gmail?
Let’s start with some general reasons responsible for this Outlook syncing issue. However, users due to some issues say that Outlook for Mac not syncing with Gmail account. Sometimes, we need to sync Outlook with Gmail because it is easier to search emails in Gmail than in Outlook.