Using Outlook with Gmail
Using Outlook on a computer to connect with Gmail is hardly the recommended process, but if the end-user MUST have Outlook here is how you can make it work.
Before You Use Outlook:
Outlook is NOT a preferred technology when interfacing with our email system since it circumvents several security technologies built into the Google Mail User Interface. Though outlook may have what appears to be a better more readable user interface, many improvements can be done to the look and feel of your Google Inbox to make it look the way you want it to, and also make it function they way you want as well.
Before you say MAIL MERGE is the reason you must use Outlook, please consider that Google now has a mail merge function that should suffice for most of our Mail Merge users.
How to Connect Outlook to Gmail
In the event that any of these steps do not work it could be caused by an OS or Application update. Check back to the original point of reference when creating this document found here:
https://support.google.com/a/users/answer/153871?hl=en&ref_topic=28354