1 user no longer Archiving with EV

Hi all,

Right ive just done the EV course, No previous experience with EV and now my first EV fault!

All my users are working fine except one, who's emails have not archived since Aug. Now she was on client 7.5 and i upgraded her to 9.04 (server version is 8). I thought with 9.0.4 having logs it maybe able to shed some light but no luck. Can anyone point me in the right direction to start troubleshooting this. Shes in all the right groups and everyone else is working fine.

Thanks in advance guys!