Update to Default blocked file types in Outlook web and new Outlook for Windows [MC1090702]

Update to Default blocked file types in Outlook web and new Outlook for Windows [MC1090702]

Message ID: MC1090702 As part of our ongoing efforts to enhance security in Outlook Web and the New Outlook for Windows, we’re updating the default list of blocked file types in OwaMailboxPolicy. Starting in early July 2025, the following file…
Resharing to external users required after enabling Microsoft SharePoint integration with Microsoft Entra B2B [MC1089315]

Resharing to external users required after enabling Microsoft SharePoint integration with Microsoft Entra B2B [MC1089315]

Message ID: MC1089315 As part of our ongoing efforts to enhance security, we are making a critical change to how Microsoft SharePoint and Microsoft OneDrive integrate with Microsoft Entra B2B. This change affects how external users access previously shared content.…