Latest update brought the search bar on top , below you will find how to reset it.
Method #1:
Locate the Coming Soon toggle on top right corner , turn it off , and restart outlook.
Method #2:
You can create a new profile in case some personal settings are corrupted.
If not, some registered settings may be broken during shutdown, reset Outlook related settings in Registry:
Find this path: HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook
Rename it to Outlook-1
Restart Outlook.
Method #3:
Revert back to previous outlook versions , check the below link to see the instructions
http://raboninco.com/lvub
Method #3:
Revert back to previous outlook versions , check the below link to see the instructions
http://raboninco.com/lvub