When another person at my office transfers an external call to me, my phone only displays the internal person's Caller ID info. Is it possible for me to see the external party's Caller ID info?

Yes, although changing this will mean that you will not know who is transferring the call to you.

Login at https://dialpad.com, scroll down and click Your Devices, and then click Advanced Settings.

The Advanced Settings window will open and within the Calls to your departments/office main line section, click the button to select the option for Display the caller's number.

Click Save Changes (at the bottom) and the change will take effect immediately.