I think the answer to this is a definitive "No"... but I'll ask anyway.

Is there any way to forward calls to an alternate number and still have the original caller's caller ID information come through to the forwarded phone? We have a user working remotely and we're forwarding his calls to a VoIP phone (not on our Intertel system...we don't have VoIP). It works fine, but all the caller ID info comes through as our office, instead of the actual caller... for obvious reasons.

Any workarounds?

The short answer to your question is that you are correct. The answer is no. There are workarounds, but I don't know how well they will work for your situation. For instance, I have calls that ring into a call routing table, but if they fit the pattern, the CRA doesn't answer. It allows them to ring at specific stations, then if there is no answer it uses no answer call forwarding on the trunk to forward to a cell and displays the correct CID.

If that won't work maybe we can brainstorm on some other ideas.