That would be Active Sync:

https://learn.microsoft.com/en-us/exchange/clients/exchange-...

Not sure how Mozilla went about the implementation, but I do agree it would be a concern to verify before using.

You can perform the following Exchange ActiveSync tasks:

    Enable and disable Exchange ActiveSync for users

    Set policies such as minimum password length, device locking, and maximum failed password attempts

    Initiate a remote wipe to clear all data from a lost or stolen mobile phone

    Run a variety of reports for viewing or exporting into a variety of formats

    Control which types of mobile devices can synchronize with your organization through device access rules

Some clients perform some of those operations in a sandbox. Eg. Nine for Android let's you choose when you set up an account whether a remote wipe command should just wipe that account's local mailbox, or your whole device.

ActiveSync will forever be reserved for the technology I used to sync email and calendar on my HP Jornada 430 running Windows CE - just like James Bond did!