Open your Outlook App on your Desktop.
Now Navigate to the Top left Corner and select the “File” Option to access the Account settings menu.
Now select “Account Settings” to access the email account that you want to log out.
Select the “Account” that you want to log out from the Outlook Application on the desktop.
When you “select the email account”, click on the “Remove icon” to sign out of the email account from your Outlook.