Before trying to remotely access a device, make sure all setup has been done and the gateway to your device is "live". Refer to Getting Started with Unattended Access for more information on prerequisites and setting up gateways.
To remotely access a device:
In order to allow Admin By Request to connect to your endpoints, they need to allow traffic on the following ports:
RDP - 3389 (Windows only)
SSH - 22
VNC - 5900 and 5901
From the portal, head over to your Inventory and make sure you're in the Secure Remote Access view. Select an endpoint which is enrolled for Secure Remote Access:
Click the Remote link for this endpoint, enter User name and Password and click Connect:
After a few seconds, the connection appears directly in your browser.