ShoreTel CallerID problem: shows main number instead of DID

All, I got stuck the other day on an issue where every phone in the company that called out has a callerID of the main corporate number.  I had in the BTN of the trunk group the main number, and that was the number the callerID showed for everyone.  Well, they didnt want that.  They wanted each individuals number to show up.  That made sense, but I couldnt seem to find where to override this and make it show the DID of the individual.  Well, I did find it.  It was under the "Trunk Group" and specific Trunk, where "Enable Original Caller Information" was checked.  Simply uncheck it and the DID shows up.