Outlook for Mac sync issues

Just had a Chat with support and this was their advice. It's worked for now, will see how it behaves over the next week:

Please remove the account from New Outlook and add the account via Direct Sync method.
1. Navigate to Outlook menu bar at the top of the screen
2. Click on "Tools" -- "Accounts"
3. Click on the "+" sign
4. Type in the email address and click on "Continue"
5. Click on the "Not (Google/Yahoo/iCloud/IMAP)?" on the top right of the next window which appears
6. Toggle the switch next to "Sync with Microsoft Cloud", so it turns to gray from blue
7. After which, select "Google"
8. Type in your password for the email account
9. Click on "Add Account"