NEW Message Center Announcement on your Tennant Admin pages!!MC191153, Plan For Change, Published date: Sep 20, 2019View this message in the Office 365 message center   Beginning October 13, 2020, we will retire Basic Authentication for EWS, EAS, IMAP, POP and RPS to access Exchange Online. Note: this change does not impact SMTP AUTH. … Continue reading Basic Authentication Retirement for legacy protocols in Exchange Online →