You may already be aware that Microsoft has announced the deprecation of Basic Authentication on March 1, 2026 due to potential security risks. This means that any applications or services relying on Basic Authentication for sending email through Microsoft 365 or Exchange Online will stop functioning as expected after that date. For further information, refer to Microsoft’s announcement. Deprecation of Basic authentication in Exchange Online | Microsoft Learn

What this means

This will affect all sites using Office 365 or Exchange Online with B4B Payments and Remittances, iPOS, Collect and CSB.

PA's email delivery system relies on Basic Authentication via SMTP. In response to the notification from Microsoft, PA have developed the SMTP to Graph Gateway application that uses OATH2 for modern, secure authentication. The key benefits of this are:-

  • Enhanced security and compliance
  • Improvements on reliability
  • Future proof support beyond 2026

If you are affected by this change from Microsoft, please log a FreshDesk ticket - https://support.professionaladvantage.co.uk/. We will then send you a link to download the SMTP for Graph Gateway for your IT to install.