Remove The New Sidebar in Outlook 365

Microsoft moved the navigation buttons from the bottom of the folder list to the left of the folder list (just like in Outlook on the web).

To remove this bar that and restore it to the bottom of the folder list follow these instructions:

Restore the Sidebar using PowerShell:

1. Click on start button.

2. Search and select for Windows PowerShell.

Here enter the following command:

New-ItemProperty HKCU:\SOFTWARE\Microsoft\Office\16.0\Common\ExperimentEcs\Overrides -Name Microsoft.Office.Outlook.Hub.HubBar -Value false -PropertyType string -force

Hit enter.

Restore the Sidebar using Registry Editor:

1. Click on Start search and select for Registry Editor.

2. Navigate to:

Computer\HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\ExperimentEcs\Overrides

3. Double click on Microsoft Office Outlook Hub.

4. Change the value to false.