Microsoft is discontinuing basic HTTP authentication for Exchange on October 1st. While SMTP basic authentication, which appears to be used in our email connectors, will continue to function based on Microsoft's documentation:

Deprecation of Basic Authentication in Exchange Online

Considering this deprecation, Microsoft advises us to explore alternative options. Anticipating that similar queries may arise from various customers, we kindly request the development of a new email connector (or an update to the existing one) that supports alternative authentication protocols. This proactive approach will help address potential customer demands as they begin to inquire about this change more frequently.