How do I get the new UI in Outlook?
To do this, click File > Account Settings > Account Settings > Set as Default. Restart Outlook and click on the Try the New Outlook toggle.
Has Outlook changed its format 2022?
The left-side navigation menu is now the default view in Outlook 365 for Windows. The rollout is happening from mid-August 2022 (delayed from mid-July) through into late September 2022.