Sign up for Office 365
Learn more about Office 365
Do you mean you can't send email? If so, you can try to do the same thing on OWA (http://mail.office365.com/) If it's working, you need to check the configuration of your email application.
Thanks, Neo Zhu
How are you doing? I am just writing to see if there is any progress on this issue. I do not mean to push you. I just want to ensure that you do not encounter any problems during the troubleshooting. Thank you.