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An Exchange 2010 CAS server has four internal URLs for various services: OAB, EWS, AutoDiscover, and ActiveSync. Is there any harm in not having all of them set to the same URL? <br />
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Specifically I'd need to have the AutoDiscover URL set differently than the OAB, EWS, and ActiveSync URLs.
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An Exchange 2010 CAS server has four internal URLs for various services: OAB, EWS, AutoDiscover, and ActiveSync. Is there any harm in not having all of them set to the same URL? 

Specifically I'd need to have the AutoDiscover URL set differently than the OAB, EWS, and ActiveSync URLs.

Exchange 2010 CAS internal URLs

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.