Registered at your exchange but received no activation email for over an hour now, if I try to login it says I must first activate account. There is no "Resend activation email" button anywhere.
Hard to say why you have not got mail, but you can login now.
Yes, check spam folder also.
Nothing in spam folder or anywhere else but I was able to login and afterwards received PIN code to email main inbox. So there is somewhere a problem with sending first ever email (activation link or whatever it is), PIN code email works fine.