The following has been recently announced by Microsoft:
“Basic Authentication Retirement for legacy protocols in Exchange Online
Major update: Announcement started
Applied To: All customers
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.
There are several actions that you and/or your users can take to avoid service disruptions on client applications, and we describe them below. If no action is taken, client applications using Basic Authentication for EWS will be retired on October 13, 2020.”
Enhancement request 153509 has been submitted to add alternate authentication methods.
STATUS
Modern Authentication has been implemented in Active Roles versions 7.4.3 and later.
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