This tutorial demonstrates how to configure Outlook 2010, 2013, and 2016 on Windows for @colorado.edu Gmail accounts. The screenshots are for Outlook 2013, but the steps are the same for all versions.
You may need to enable IMAP for your account prior to configuration of your email client (https://mail.google.com). To do this:
In Outlook, open the File Menu, select the Info tab and click Add Account.
Click Manual setup or additional server types and click Next.
Select POP or IMAP (or Internet Email for Outlook 2010) and click Next.
Enter the following for your server settings:
Click the Outgoing Server tab and check the box next to My outgoing server (SMTP) requires authentication, then click the Advanced tab.
Adjust the server settings to the following:
Click OK to save.
*Note: If you are experiencing issues connecting with port 587 for Outgoing server (SMTP), try changing this to port 25.
Outlook will test your account settings. If it completes successfully, click Close.
*Note: If it does not complete successfully, review this document and check your account settings again.
Click Finish and your account will be configured.
Some users may need to change their app security settings when using non-google and android email programs. While signed into your Gmail account in a browser, open the Google Apps menu, then select My Account.
*Note: You should try to connect your account without changing these settings and change only if the previous steps don't work.
In the Sign-in & Security section, select Connected apps & sites.
Scroll down to the Allow less secure apps section and change the setting to On. You should now be able to connect your account to an email client.