Clone a Microsoft Azure Virtual Machine

We have a Microsoft Azure account with several Virtual Machine's running. We wish to duplicate one of these VM's to a new instance without affecting the old one. The reason we want to do this is because it will save us a lot of time having to reinstall and configure our applications for the new instance.
Please only reply if you are proficient in Azure and are confident you can complete this task.

Please also advise if you are familiar with Apache Guacamole as our next project will involve applying this on the new VM.