If you're syncing directly to Outlook (using Ovi Suite/Nokia Suite) then there's zero chance of remote wipe, and the only way a local wipe could be donw would be to wipe your Outlook details, then sync.

If you're syncing remotely using MfE then they could probably wipe whatever contacts, email & calendar entries you're syncing with the server, but again there's zero chance of wiping anything else on the N900.