authentication extension

The authentication extension tag on WindowsForum.com covers discussions about Microsoft's extension of Basic Authentication support in Microsoft 365 until September 2028, as part of updates to the High Volume Email (HVE) service. This extension gives organizations more time to transition to secure authentication methods. The tag focuses on Microsoft 365 authentication changes, including internal-only email restrictions for HVE and broader authentication support timelines. Content under this tag is relevant for IT administrators and enterprise users managing authentication transitions in Microsoft 365 environments.