I'm not able to spin up an instance to test with this week .. but if my linux hosts -inside- my network can auth to my corporate AD (and they can!) I don't know

I'm not able to spin up an instance to test with this week .. but if my linux hosts -inside- my network can auth to my corporate AD (and they can!) I don't know why an AWS EC2 instance would be different. Add the software, configure, and presto?