I and my co-workers were just given less than 24 hours' notice that our company email is being migrated from Exchange to Office 365 tomorrow morning, that we are to use webmail until our Outlook installations have been modified, and that some functions may be unavailable for an unspecified period of time. Of course, our webmail access hasn't been configured yet.
Really looking forward to surfing the web and watching YouTube for hours while they untangle the monumental mess tomorrow.