Modify the URL with a layout option Switching between the 3 different layouts is hidden from the interface but can be done by appending a layout option to the base OWA URL.
For most companies, the URL after logon will look something like this: https://mail.domain.com/owa/#path=/mail
For Office 365 Exchange Online subscribers, the URL will look like this: https://pod12345.outlook.com/owa/#path=/mail Type one of the following parameters behind the /owa/ part to change the layout. ?layout=tmouseDefault layout optimized for mouse usage. This is the standard on normal desktops and devices with a supported browser. When the browser isn’t supported, OWA Light will be loaded instead.