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Microsoft SharePoint Online: We will remove retired DISCO and WSDL web pages

From Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.
SharePoint Online
Microsoft 365 admin center

Schedule dates changed in the text

Date phrases in schedule sentences differ between the versions this installation saw
  • Seen 20 Oct 2025 late October 2025, end of November 2025
  • Seen 4 Sep 2025 mid-August 2025, mid-September 2025

Read from date phrases in Microsoft's text, not from notice metadata. A changed phrase can be a moved rollout, a new milestone or just rewording; "What changed" below shows which.

What the notice says

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Updated October 20, 2025: Removal of these pages have started in late October 2025 and will be fully completed by end of November 2025.

ASP.NET DISCO and WSDL pages were the web service APIs for customers who wanted to create a proxy for their web services. The retirement of ASP.NET web services was announced in 2013 and should not be used. We encourage customers to move away from consuming these pages and use Microsoft Graph for remote operations where possible.

Please refer to the following information regarding the DISCO and WSDL endpoints

  • These endpoints were originally designed for use with development tools from the early 2000s and were never a preferred or widely adopted method for generating proxy classes in SharePoint development.
  • These endpoints are not tenant-specific and are not associated with any individual tenant’s configuration or ownership.
  • Usage across the SharePoint Online service is extremely rare. In fact, most of these endpoints show zero usage.
  • These endpoints were primarily used in legacy development scenarios and are not required for modern SharePoint development practices.
  • If your organization has an internal development team, we recommend consulting with them to confirm whether these endpoints are in use. However, it is extremely unlikely that they are being used in any current development workflows.

Learn more: Removal of deprecated DISCO & WSDL aspx pages from SharePoint Online - Microsoft 365 Developer Blog

What changed

Between archive captures, newest first

  1. Updated September 4,October 20, 2025: After further review, the original deprecation decision and goal remain unchanged. At this time, we are deferring the effective date. We Removal of these pages have started in late October 2025 and will communicate the timeline when we are ready to proceed and remove these web pages. We apologize for any inconvenience.be fully completed by end of November 2025. ASP.NET DISCO and WSDL pages were the web service APIs for customers …

  2. Updated May 22,September 4, 2025: After further review, the original deprecation decision and goal remain unchanged. At this time, we are deferring the effective date. We have updatedwill communicate the content. Thank youtimeline when we are ready to proceed and remove these web pages. We apologize for your patience.any inconvenience. ASP.NET DISCO and WSDL pages were the web service APIs for customers … web services was announced in 2013 and should not be used. We recommend using Microsoft Graph for remote operations where possible. We will remove encourage customers to move away from consuming these pages fromand use Microsoft SharePoint Online starting mid-August 2025 and ending in mid-September 2025.Graph for remote operations where possible. Please refer to the following information regarding the DISCO and WSDL endpoints …

    • Tags User impact, Admin impact, Retirement → Updated message, User impact, Admin impact, Retirement

    Updated May 22, 2025: We have updated the content. Thank you for your patience. ASP.NET DISCO and WSDL pages were the web service APIs for customers … from Microsoft SharePoint Online starting mid-August 2025 and ending in mid-September 2025. Please refer to the following information regarding the DISCO and WSDL endpoints These endpoints were originally designed for use with development tools from the early 2000s and were never a preferred or widely adopted method for generating proxy classes in SharePoint development.  These endpoints are not tenant-specific and are not associated with any individual tenant’s configuration or ownership. Usage across the SharePoint Online service is extremely rare. In fact, most of these endpoints show zero usage. These endpoints were primarily used in legacy development scenarios and are not required for modern SharePoint development practices. If your organization has an internal development team, we recommend consulting with them to confirm whether these endpoints are in use. However, it is extremely unlikely that they are being used in any current development workflows. Learn more: Removal of deprecated DISCO & WSDL aspx pages from SharePoint …

  4. · first version seen

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