A desktop publishing application from Microsoft that focuses on page layout and graphic design.
Yes—there is a difference between the Microsoft 365 version of Publisher and a perpetual standalone version.
- If Publisher is part of a Microsoft 365 subscription: access ends after October 1, 2026. After that, Publisher will no longer be included in Microsoft 365, and Microsoft 365 subscribers will no longer be able to open or edit Publisher files in Publisher.
- If Publisher is a perpetual standalone version: it can still be installed and used beyond October 2026, but support ends in October 2026.
For the specific concern about old .pub files:
- With Microsoft 365 Publisher, those files will no longer be openable in Publisher after the retirement date.
- With a perpetual version of Publisher, existing files can still be accessed and edited after that date.
For ongoing work:
- A perpetual standalone version can continue to function on the device after October 2026, so it can be used for existing files and continued creation/editing of Publisher files.
- The important limitation is that it will be unsupported after October 2026.
Recommended preparation before October 2026:
- Search for
.pubfiles on the PC, OneDrive, or SharePoint. - Convert important files to PDF for viewing:
- Open the Publisher file.
- Go to File > Save As.
- Choose a location.
- Select PDF as the file type and save.
- If editable copies are needed, convert to PDF first, then open that PDF in Word using File > Open. The layout can change, especially in graphic-heavy files.
- If there are many files, bulk export to PDF can be automated with a PowerShell script.
So the mixed messages resolve to this:
- No, a Microsoft 365 Publisher install will not remain available after October 1, 2026.
- Yes, a perpetual standalone Publisher version is the path that continues access to old files and ongoing Publisher use after that date, but without support.