These instructions are on how to Install Microsoft Remote Desktop. This was done on a Macbook with Yosemite (10.10).(Other versions may vary).
1 - Go to Appstore and search for Remote Desktop. Then get Microsoft Remote Desktop
2 - Install App.
3 - It will now say installing.
4 - Once installed you can find Microsoft Remote Desktop in Launchpad
These instructions are on how to launch your Hosted Desktop on a Mac. This was done on a Macbook with Yosemite (10.10). (Other versions may vary).
1 - Go to Launchpad then launch Microsoft Remote Desktop
(e.g. Company.Hosteddesktopuk.co.uk:3390)