Orchestrator configure url

[ddpadil (Dilip)]

The Orchestrator URL your using is for the academy training purpose .If I recall correctly it will be valid for 7 days for each tenant.
You can make use of Orchestrator CE which is compatible with 2017 CE.

Configuring Orchestrator + UiPath Robot

Trial versions use the same release pipeline as Pro (basically they are Pro, just time limited) and Pro is still on 2016.2. If you’re trying to connect 2016.2.6379 to 2017.1 Orchestrator, you will have issues - they are not directly compatible, as far as I know. Try with Community Edition, as @ovi suggested or contact UiPath sales/support, they should still have a 2016.2 Orchestrator for demo/evaluation.

IF your using other version then there is chance of getting error.

Does your RDP meets the below requirement . Please check below.
Hardware
Software