"Users may be unable to send or receive email messages within the Exchange Online service."
It does not seem limited to any email services and not all emails are dropped. So far I have not observed any bounce or failed delivery messages so it appears emails are silently failing.
"Users may be unable to send or receive email messages within the Exchange Online service."
It does not seem limited to any email services and not all emails are dropped. So far I have not observed any bounce or failed delivery messages so it appears emails are silently failing.