I don’t think there is an issue as long as the addresses resolve correctly on the server. I believe that Exchange would typically be an https <- notice the S address. Sharepoint is typically just port 80. Are you the only IT support staff for your location or is there someone else that supports web services? If there is another web services person I would also check with them about this issue and ask them to check the server logs to see if any visits are being tracked on either website and any event log errors on the server.
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