IMAP will now be enabled on your Gmail account.

Now click Save changes from the bottom of the page.

Now click Forwarding and POP-IMAP from the top.

Click on the gear (settings) icon in the top-right corner and then click See all settings.

Perform the following steps to enable IMAP on your Gmail account: Before you begin, make sure that you have enabled IMAP for your respective accounts. Let us now continue to see how you can solve the issue of Outlook hanging and successfully being able to sync your GSuite or Gmail account. That is why, people prefer to use IMAP instead of POP3, as POP3 eliminates the chances of having a backup of the important emails. However, POP3 transfers emails from one server to another, then deletes the original emails from the source server. POP3 is also an email transferring protocol. IMAP copies emails from one server and stores them on another. Internet Message Access Protocol (IMAP) is an email protocol that transfers your emails from one server to another, allowing cross-platform email access.

Using Selective Sync Option in Microsoft Outlook.

Office 365 outlook 2016 sync issues