Console not opening

http://support.diditbetter.com/kb/a2e_193.aspx

also this can be caused by not having the upgrade to the latest CDO if it is the standalone ExchangeMapi CDO installation

Stop A2E Service – put service on manual

Uninstall the old cdo

Reboot

Install the new CDO

http://www.microsoft.com/en-us/download/details.aspx?id=1004