Does double encryption occur when Outlook Anywhere automatically encrypts MAPI data?

Question

Does this checkbox mean that MAPI-based RPC data will be encrypted and then encapsulated over HTTPS, resulting in double encryption?

I'm asking this question based on this understanding of terms.

Answer 1

The MAPI encryption that is enabled by default is between your Exchange servers and Outlook, within your LAN. Outlook Anywhere uses https over the Internet. I would not use http over the Internet, but internally there might be some benefits (eg with older clients).