How to sync Microsoft Live email with blackberry using MSP

I am new to blackberry's but have been following these forums for a long time (waiting on the Storm 2). I use Microsoft live email and would like it to sync my read/ unread status in both directions (from device to BB and vice versa). However I have been reading that BIS only syncs one way with IMAP.

Does the (new) option to use Microsoft MSP as an alternative to IMAP or POP3 provide this 2-way synchronization or is there another way (i don't want to pay for AstraSync or similar services). Thanks in advance.