I Just bought office 365 and activted on my mac, 

auto configured with the exchange server for my company. all is well for the beginning, it downloads the latest emails first and procedes to download the rest, I can read those and send new ones however after this I do not get any more emails.

I tried deleting the account and readding, and nothing, same behavior ( I can't be adding and removing accounts all day long..)

somethign happened while I was deleting the account the first time the app started appering as "Not responding", so I force killed it, and reopnned it, at that time it redownloaded the emails.

thank you in advance for the possible help