If you had problems yesterday evening (2/3/2021) with slow mail and/or failures through Microsoft 365, chances are you were not alone.
Microsoft 365 announced there were issues causing delays and failures with Exchange Online, impacting email sends throughout North America yesterday evening.
Those issues have been mitigated, according to Microsoft 365 Status (@MSFT365Status) on Twitter. You should be experiencing normal email services again at this time.
Epoch will continue to monitor any arising issues. Please contact us with any questions!