Ensure you reach out to your organization to confirm you meet any required prerequisites (i.e. have an active Army 365 account, updated Cyber Awareness and IT User Agreement)
Select the platform you intend to use the Windows App (Remote Desktop client) on. These should be downloaded on your personal devices as it may violate your organization’s Acceptable Use Policy (AUP) if you attempt to download and install this on Government Furnished Equipment (GFE).