Step1: Check that IMAP is turned on

  1. On your computer, open Gmail.
  2. In the top right, click Settings Settings.
  3. Click Settings.
  4. Click the Forwarding and POP/IMAP tab.
  5. In the "IMAP Access" section, select Enable IMAP.
  6. Click Save Changes.

Step2: Configure Outlook Client

  1. Open Outlook
  2. Select setup to an Email Account
  3. Select Manual Setup or Additional Server Types
  4. Click Next
  5. Select IMAP
  6. Enter IMAP configuration as below:
  7. Click More Settings
  8. Click  Outgoing Server tab
  9. Check My outgoing server(SMTP) requires authentication
  10. Select Use same settings as my incoming mail server 
  11. Click Advance tab
  12. Enter port number and Encryption type as below: