Microsoft Publisher stops working: .pub files no longer open in Microsoft 365

Microsoft has retired Publisher: the app disappears from Microsoft 365 subscriptions starting October 1, while perpetual Office 2021 and LTSC 2021 lose support on October 13. .pub files can no longer be opened in Microsoft 365, and Microsoft recommends converting them to PDF, including bulk exports via a PowerShell script.

• Publisher disappears from Microsoft 365 on October 1; Office 2021 and LTSC 2021 support ends October 13
• .pub files no longer open in Microsoft 365 and must be converted to PDF
• Microsoft offers the Convert-PubFileToPDF.ps1 PowerShell script for bulk exports
• Alternatives include Word, PowerPoint, Canva, Affinity Publisher and Scribus