To be fair, the word probably wasn't chosen to obscure the fact that it's a remote wipe. Provisioning, in the context of e.g. a SIP telephone set, means to force-feed some set of standard settings to the thing. Wiping anything the user does, or might have done, is secondary.
Doesn't change the fact that this is not at all a good idea. Among other reasons: why the hell should an email/contacts/calendar/whatever-else-Exchange-does client have root access?