BETA-1.1006.210.62 + Exchange 2010 + Mitel 5312- MWI

Hi everyone - I hope you can help or point me in the right direction.
I have just installed BETA-1.1006.210.62 and integrated with Exchange 2010 UM.
All seems to be working ok using X-Lite softphones + Mitel5312 + SPA3102.
I would like to get MWI working, I have seen various threads relating to a patch for previous versions of asterisk and was wondering if this release contained that patch and if so what steps to take in order to get it to work.
Exchange is reporting “Server FreePBX Gateway failed with 489 bad event”


That’s an Asterisk patch. You need to check over at