It's impossible to setup Office 365 without a messaging gateway With GSuite, google does a good enough job where you really don't need a gateway With all of that being said, users are use to what they are just plain use toStep 3 Enable folders Outlook and Mail for Windows 10 need access to your folders in Gmail Make sure that the folders are set to show in IMAP In a browser, go to Gmailcom Select > Settings Select the Labels tab Make sure that Show in IMAP is selected for Inbox, Sent Mail, Trash, and All Mail You can also select Show in IMAP for otherGSuite user Sync Issues What to do if the G Suite user sync stops working The issue with G Suite user sync is almost always related to synchronisation admin to loosing permissions in G Suite To find out what is causing the issue, we recommend using the G Suite Admin Audit panel to check what was changed with your sync admin permissions and Learn About Google G Suite Sync For Microsoft Outlook Systools Software G suite sync conn...