Security with RPC over HTTP/S on Exchange 2003

[Mohamed Farid <m.farid.shawara () gmail com>]

 Dear All :

Is there any security issues to use RPC over HTTP/S on Exchange 2003 ?
Is it more secure to be used than using only SSL to the Exchange OWA Site ?

Knowing that the Exchange is a single node - and there will be a Cisco
Firewall in front of it to allow only the RPC ports or the https port ?

Thanks ,,,

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