Issues with Saving PDF Files in Word 365

Many users of Microsoft Word have experienced difficulties in saving documents in PDF format in recent days. These issues particularly arose after the update to version 2609 of Microsoft 365. Files were not saved as usual but ended up in hidden folders with random filenames, making them hard to locate. The specific problem affects the saving of PDF files to SharePoint locations. Users reported that when attempting to use the 'Save' or 'Save As' commands, the files were not transferred to the desired storage location.

Instead, they were placed in the folder C:\Users\Username\AppData\Local\Microsoft\Windows\INetCache\Content.MSO. Microsoft has officially confirmed the issue and stated that there is no error message when the saving fails. Additionally, the files do not receive meaningful names, further complicating the identification of the documents. The problem occurs exclusively when the file type 'PDF' is selected and a SharePoint storage location is specified. To resolve the issue, Microsoft recommends reverting to the previous version 2608.

This version appears not to be affected by the described difficulties. Users who continue to experience the problem should close all open Office applications and restart Word to ensure that the changes take effect. On September 25, 2026, a service change was implemented that was supposed to resolve the issue. Microsoft has informed users that the changes have been fully implemented and that most users should no longer encounter difficulties.

User feedback following the update has been predominantly positive. The difficulties in saving PDF files are not the first time Microsoft Word users have encountered issues. Similar incidents have occurred in the past, but they were typically resolved quickly. Microsoft is committed to continuously improving the user experience and addressing such problems in a timely manner. Version 2609 of Microsoft 365 is part of a series of regular updates aimed at enhancing the functionality and security of the software.

Microsoft has announced that further improvements and bug fixes will follow in future updates. For users who have upgraded to the latest version of Microsoft 365, it is important to regularly check for updates and keep the software up to date. This can help avoid similar issues in the future and optimize the overall performance of the applications. Microsoft plans to provide the next major update for Microsoft 365 in the fourth quarter of 2026, which will include additional features and improvements.