Microsoft Ends Publisher Support on October 1, 2026: Convert Files Now

Microsoft is ending support for its Publisher application on October 1, 2026, as part of its Microsoft 365 subscription. This means that users will no longer be able to access or edit .pub files in the application.

The company recommends converting all Publisher files to a different format before this date to ensure continued accessibility. This can be done manually by exporting each file as a PDF and saving it with a predictable output name, or through a PowerShell script for bulk conversion.

Users are advised to create an inventory of their .pub files, including their full path, filename, modification date, owner or business area, and planned destination. This will help identify any duplicates and ensure that all necessary conversions are completed before the deadline.