[MS-OXWSXPROP]: Extended Properties Structure https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXWSXPROP/1e0ae5e6-c516-4ad1-ad12-c19fee04860a Specifies the Extended Properties Structure for Web service protocols, which is a container for custom properties on items and folders in a mailbox. Major Update for [MS-OXWSXPROP] (Version 13.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXWSXPROP/1e0ae5e6-c516-4ad1-ad12-c19fee04860a <b>Protocol Revision:</b> 13.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP].pdf">PDF</a></li><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-250520.docx">DOCX</a></li></ul> Tue, 20 May 2025 MS-OXWSXPROP-20250520 Major Update for [MS-OXWSXPROP] (Version 12.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXWSXPROP/1e0ae5e6-c516-4ad1-ad12-c19fee04860a <b>Protocol Revision:</b> 12.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-181001.pdf">PDF</a></li><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-181001.docx">DOCX</a></li></ul> Mon, 01 Oct 2018 MS-OXWSXPROP-20181001 Major Update for [MS-OXWSXPROP] (Version 11.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXWSXPROP/1e0ae5e6-c516-4ad1-ad12-c19fee04860a <b>Protocol Revision:</b> 11.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-180724.pdf">PDF</a></li><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-180724.docx">DOCX</a></li></ul> Tue, 24 Jul 2018 MS-OXWSXPROP-20180724 No Update for [MS-OXWSXPROP] (Version 10.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXWSXPROP/1e0ae5e6-c516-4ad1-ad12-c19fee04860a <b>Protocol Revision:</b> 10.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-160914.pdf">PDF</a></li><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-160914.docx">DOCX</a></li></ul> Wed, 14 Sep 2016 MS-OXWSXPROP-20160914 No Update for [MS-OXWSXPROP] (Version 10.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXWSXPROP/1e0ae5e6-c516-4ad1-ad12-c19fee04860a <b>Protocol Revision:</b> 10.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-160613.pdf">PDF</a></li><li><a href="https://msopenspecs.microsoft.com/files/MS-OXWSXPROP/[MS-OXWSXPROP]-160613.docx">DOCX</a></li></ul> Mon, 13 Jun 2016 MS-OXWSXPROP-20160613