But to prevent office to send your ip to microsoft, u'll need to do this trick:
1. Open the terminal.
2. Type : sudo sh
3. enter your root password
4. type : /sbin/ipfw add 0 deny udp from any to any 2222
5. press enter
- you should see : 00000 deny udp from any to any 2222 -
6. type : /sbin/ipfw add 0 deny tcp from any to any 3464
7. press enter
- you should see : 00000 deny tcp from any to any 3464 -
8. type : exit
9. Press enter
10. You're done