Some clients like e.g., iOS require the full version number in the headers.

Fixes iOS devices detecting available versions. E.g. 5.1.1 on older
generation iPhones/iPads will now detect and use 14.0 instead of
the previous max of 12.1.

Also rearrange the Commands header to match what Exchange 2010 sends.
Exchange 2010sp2 is technically EAS 14.2.

No additional functionality added, just two additional security policies.
Add some more Exchange-ish headers to the OPTIONS response.