Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations

Title: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations User impact: Users may have been unable to convert Word desktop app documents to PDFs using Save As to SharePoint locations. More info: This issue was reported to affect Microsoft Word version 2609, and some users reported that version 2608 wasn't affected. No error was presented and the file was instead saved to the “C:\Users\username\AppData\Local\Microsoft\Windows\INetCache\Content.MSO” folder with an incorrect file name. While we focused on remediation, users that had the option to save the file locally to their computer may have used this to work around the problem. Additionally, using the Export to PDF function worked as expected. Final status: We've finished deploying our change to disable the impacting behavior and have confirmed that this has resolved the issue through service health telemetry. Scope of impact: This event may have impacted any user on version 2609 attempting to save Microsoft Word desktop app documents as PDFs to SharePoint Online. Start time: Tuesday, September 8, 2026, at 7:00 AM UTC End time: Friday, September 25, 2026, at 11:00 PM UTC Root cause: A recent Microsoft Word change relating to the Save As filename validation path to cloud-backed locations prevented the SharePoint save flow from completing and was causing impact. Next steps: - We're reviewing the responsible change to better understand what led to the error that resulted in impact and prevent similar future occurrences. This is the final update for the event.

Title: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations User impact: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations. More info: This issue is reported to affect Microsoft Word version 2609, and some users report that version 2608 isn't affected. No error is presented and the file is instead saved to the “C:\Users\username\AppData\Local\Microsoft\Windows\INetCache\Content.MSO” folder with an incorrect file name. Additionally, this only reported to only impact converting Microsoft Word desktop app documents to PDFs using Save As and SharePoint Online as the location. While we're focused on remediation, users that have the option to save the file locally to their computer may use this to work around the problem. Additionally, using the Export to PDF function works as expected. Current status: We've confirmed that the issue is related to a recent Microsoft Word change affecting Save As filename validation for cloud-backed locations. This validation issue prevents the SharePoint save process from completing successfully during PDF conversion. We're actively deploying a change to disable the impacting behavior and expect this deployment to be completed by our next scheduled update. Scope of impact: This event may impact any user on version 2609 attempting to save Microsoft Word desktop app documents as PDFs to SharePoint Online. This information may be updated as our investigation continues. Start time: Tuesday, September 8, 2026, at 7:00 AM UTC Root cause: A recent Microsoft Word change relating to the Save As filename validation path to cloud-backed locations, which prevents the SharePoint save flow from completing and is causing impact. Next update by: Monday, September 28, 2026, at 9:00 PM UTC

Title: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations User impact: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations. More info: This issue is reported to affect Microsoft Word version 2609, and some users report that version 2608 isn't affected. No error is presented and the file is instead saved to the “C:\Users\username\AppData\Local\Microsoft\Windows\INetCache\Content.MSO” folder with an incorrect file name. Additionally, this only reported to only impact converting Microsoft Word desktop app documents to PDFs using Save As and SharePoint Online as the location. While we're focused on remediation, users that have the option to save the file locally to their computer may use this to work around the problem. Additionally, using the Export to PDF function works as expected. Current status: We're in the process of disabling the impacting code for impacted users. This is a multiple-step process, and we will provide an updated remediation timeline as soon as the initial steps have been completed. Scope of impact: This event may impact any user on version 2609 attempting to save Microsoft Word desktop app documents as PDFs to SharePoint Online. This information may be updated as our investigation continues. Start time: Tuesday, September 8, 2026, at 7:00 AM UTC Root cause: A recent code change meant to optimize the save-as pathways utilized by the service contained an issue that's resulting in impact. Next update by: Friday, September 25, 2026, at 9:00 PM UTC

Title: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations User impact: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations. More info: This issue is reported to affect Microsoft Word version 2609, and some users report that version 2608 isn't affected. No error is presented and the file is instead saved to the “C:\Users\username\AppData\Local\Microsoft\Windows\INetCache\Content.MSO” folder with an incorrect file name. Additionally, this only reported to only impact converting Microsoft Word desktop app documents to PDFs using Save As and SharePoint Online as the location. While we're focused on remediation, users that have the option to save the file locally to their computer may use this to work around the problem. Additionally, using the Export to PDF function works as expected. Current status: We've identified the code change leading to this behavior and confirmed that disabling it mitigates the impact in our internal tests. Based on this finding, we've determined that this problem may have begun impacting users on Current Channel (Preview) as early as Tuesday, September 8, 2026, while non-Preview Current Channel users may have seen the issue begin on Tuesday, September 22, 2026. While we collect more information regarding this code change to include in this communication, we've halted its rollout to prevent more users from encountering this problem and are preparing to disable the impacting code for currently affected users. Scope of impact: This event may impact any user on version 2609 attempting to save Microsoft Word desktop app documents as PDFs to SharePoint Online. This information may be updated as our investigation continues. Next update by: Thursday, September 24, 2026, at 11:30 PM UTC

Title: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations User impact: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations. More info: This issue is reported to affect Microsoft Word version 2609, and some users report that version 2608 isn't affected. No error is presented and the file is instead saved to the “C:\Users\username\AppData\Local\Microsoft\Windows\INetCache\Content.MSO” folder with an incorrect file name. Additionally, this only reported to only impact converting Microsoft Word desktop app documents to PDFs using Save As and SharePoint Online as the location. While we're focused on remediation, users that have the option to save the file locally to their computer may use this to work around the problem. Additionally, using the Export to PDF function works as expected. Current status: We've internally reproduced the problem, and we're reviewing recent service changes that affect this code path to determine the cause of impact. Scope of impact: This event may impact any user on version 2609 attempting to save Microsoft Word desktop app documents as PDFs to SharePoint Online. This information may be updated as our investigation continues. Next update by: Thursday, September 24, 2026, at 9:30 PM UTC

Title: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations User impact: Users may be unable to convert Microsoft Word desktop app documents to PDFs using Save As to SharePoint locations. More info: This issue is reported to affect Microsoft Word version 2609, and some users report that version 2608 isn't affected. No error is presented and the file is instead saved to the “C:\Users\username\AppData\Local\Microsoft\Windows\INetCache\Content.MSO” folder with an incorrect file name. Additionally, this only reported to only impact converting Microsoft Word desktop app documents to PDFs using Save As and SharePoint Online as the location. While we're focused on remediation, users that have the option to save the file locally to their computer may use this to work around the problem. Additionally, using the Export to PDF function works as expected. Current status: We're investigating a potential issue with Microsoft Word saving files as PDF to SharePoint Online, and we're checking for impact to your organization. We'll provide an update within 60 minutes.