[Giovanny]

You should check with your IT department maybe they updated their securities and now you will need security certificates in order to get e-mail. This happen to me at the place where I work. Now everything works flawlessly. Every time I flash a new ROM, I always install the certificates which I always keep on my memory card and after that there are no issues with active sync. Also make sure when you choose the information you would like to sync only to choose you mail and nothing else like company contacts because that will take forever to syn and it will probably crash your phone.