Microsoft is experiencing technical issues impacting email - Office365 Wednesday May 13, 2020, 1:45 pm

All users may be unable to access the Exchange Online service

EX212990, Exchange Online, Last updated: May 13, 2020 1:53 PM

Start time: May 13, 2020 1:23 PM

Status Service degradation

User impact Users may be unable to sign in to the Exchange Online service.

According to Microsofts health monitor. This issue is now resolved.