I think I know the answer to this question already, but wanted to verify.

I have a customer with a MICS (7.1), 8 analog POTS lines, and a Call Pilot. They want to put an option on their Auto Attendant to dial a digit which will then transfer the caller to an off-site IVR system. The IVR is designed to recognize the caller/customer based upon the incoming caller ID and match it up with their account. I don't believe that when the Call Pilot/AA answers the call and then transfers the call to the off-site IVR that it will pass the original callers information. It appears that the IVR will just see a call coming from one of the MICS lines. Am I correct on this?

Yes you are correct because it it grabbing a line from their pool.

Possibly it might transfer original CLID if you use the carriers transfer option if they have it.

Dial string - #YYYXXXZZZZ

# = Link

Test by having them try and transfer your call manual - F71 then dial that number then hang up (or F71 again?)

I thought about trying that as well. This customer has their dial tone provided via a fiber fed ONT. I haven't been able to get F71 to work properly on these lines yet. The provider is going to check the provisioning and get back to me.