The SharePoint Newsfeed is a retired feature. Microsoft's modern enterprise social strategy for SharePoint revolves around integration with Yammer or using the collaborative features of Microsoft Teams. You do not use Teams and the legacy Newsfeed together; rather, you replace the Newsfeed with a modern tool.

SharePoint administrators have granular control over the services enabled within their tenant. They can enable or disable enterprise social features, such as the Yammer integration or the classic SharePoint Newsfeed, via the SharePoint admin center.

An organization must choose a single primary enterprise social collaboration service to be used across SharePoint. The tenant-wide setting allows an administrator to select either Yammer or the classic SharePoint Newsfeed, but not both simultaneously. This ensures a consistent user experience.

Microsoft Learn. (2023). Use Yammer with SharePoint Online. "In the SharePoint admin center, you can select whether to enable enterprise social collaboration by using Yammer or the SharePoint Newsfeed." This shows a choice must be made between services, not simultaneous use.

Microsoft Learn. (2023). SharePoint classic newsfeed retirement. "The SharePoint classic newsfeed is being retired... We recommend using Yammer for your enterprise social needs." This document confirms that the Newsfeed is a legacy feature being replaced, not used in conjunction with modern tools like Teams or Yammer.

Microsoft Learn. (2024). Manage settings in the SharePoint admin center. This documentation outlines the various settings administrators can control, including "Conversations and communities," which is where the choice of social platform (i.e., Yammer) is configured, implying the ability to manage and thereby disable such features.