{"id":67521,"date":"2026-03-04T13:44:54","date_gmt":"2026-03-04T20:44:54","guid":{"rendered":"https:\/\/cirasync.com\/?p=67521"},"modified":"2026-03-05T14:23:12","modified_gmt":"2026-03-05T21:23:12","slug":"ews-retirement-public-folder-replacement","status":"publish","type":"post","link":"https:\/\/cirasync.com\/de\/public-folder-sync\/ews-retirement-public-folder-replacement\/","title":{"rendered":"Microsoft Is Deprecating Exchange Web Services (EWS): What This Means for Public Folder Integrations"},"content":{"rendered":"<p><span data-contrast=\"auto\">Microsoft has officially announced the retirement of Exchange Web Services (EWS) for Exchange Online, with the service being fully disabled on October 1, 2026. This change has important implications for organizations that rely on third-party applications accessing Public Folder data, especially contacts and calendars.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h2 aria-level=\"2\"><span class=\"ez-toc-section\" id=\"What_is_Changing\"><\/span><b><span data-contrast=\"none\">What is Changing?<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:200,&quot;335559739&quot;:0}\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-contrast=\"auto\">EWS has long been used by third-party applications and custom integrations to access Exchange Online data such as contacts, calendars, mailboxes, and Public Folders. As part of Microsoft\u2019s broader security and modernization initiative, EWS will be disabled for all Exchange Online tenants on October 1, 2026. After this date, any EWS-based access will stop working.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Important: This change applies only to Exchange Online. Exchange Server\u00a0on-premises\u00a0is not affected.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h2 aria-level=\"2\"><span class=\"ez-toc-section\" id=\"Impact_on_Public_Folders\"><\/span><b><span data-contrast=\"none\">Impact on Public Folders<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:200,&quot;335559739&quot;:0}\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-contrast=\"auto\">One of the most significant consequences of the EWS retirement is its effect on Public Folders. Many third-party tools rely on EWS to read or synchronize Public Folder contacts and calendars. When EWS is disabled:<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"auto\"> Third-party applications will lose all EWS-based access to Public Folders<\/span><\/li>\n<li><span data-contrast=\"auto\">Public Folder data will no longer be accessible for syncing or integration<\/span><\/li>\n<li><span data-contrast=\"auto\">Existing workflows built around Public Folder contacts and calendars may break<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"auto\">Microsoft Graph currently offers limited support for Public Folder scenarios, which makes a direct replacement for many EWS-based Public Folder integrations impractical.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h2 aria-level=\"2\"><span class=\"ez-toc-section\" id=\"Who_Should_Be_Planning_Now\"><\/span><b><span data-contrast=\"none\">Who Should Be Planning Now?<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:200,&quot;335559739&quot;:0}\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-contrast=\"auto\">You should start planning\u00a0immediately\u00a0if:<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"auto\"> Your organization uses third-party apps that read from or write to Public Folder contacts or calendars<\/span><\/li>\n<li><span data-contrast=\"auto\">Public Folders are part of your CRM, address book, or scheduling workflows<\/span><span data-contrast=\"auto\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">You depend on bi-directional sync between Public Folders and other systems<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ul>\n<p><span data-contrast=\"auto\">Although October 2026 may seem far away, migrating shared data structures\u2014especially those tied to business processes\u2014takes time, testing, and coordination.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h2 aria-level=\"2\"><span class=\"ez-toc-section\" id=\"Recommended_Migration_Options\"><\/span><b><span data-contrast=\"none\">Recommended Migration Options<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:200,&quot;335559739&quot;:0}\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 aria-level=\"3\"><span class=\"ez-toc-section\" id=\"Shared_Mailboxes_Recommended\"><\/span><b><span data-contrast=\"none\">Shared Mailboxes (Recommended)<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:200,&quot;335559739&quot;:0}\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span data-contrast=\"auto\">A shared mailbox is often the best replacement for Public Folders when working with contacts and calendars. Shared mailboxes are fully supported by Microsoft Graph, ideal for shared contact lists and calendars, compatible with modern authentication, and supported by most third-party tools.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3 aria-level=\"3\"><span class=\"ez-toc-section\" id=\"CRM_or_Centralized_Contact_Repositories\"><\/span><b><span data-contrast=\"none\">CRM or Centralized Contact Repositories<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:200,&quot;335559739&quot;:0}\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span data-contrast=\"auto\">In some cases, organizations may choose to migrate Public Folder data into a CRM\u00a0system,\u00a0or another centralized contact repository, especially when Public Folder contacts are customer- or partner-facing.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h2 aria-level=\"2\"><span class=\"ez-toc-section\" id=\"How_CiraHub_Can_Help\"><\/span><b><span data-contrast=\"none\">How CiraHub Can Help<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:200,&quot;335559739&quot;:0}\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-contrast=\"auto\">CiraHub\u00a0is designed to help organizations adapt to the EWS retirement by providing flexible, multi-way contact and calendar synchronization.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">With\u00a0CiraHub, you can:<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"auto\"> Migrate Public Folder contacts and calendars to a shared mailbox<\/span><\/li>\n<li><span data-contrast=\"auto\">Keep data synchronized during and after migration<\/span><\/li>\n<li><span data-contrast=\"auto\">Replace Public Folder dependencies with modern, supported data sources<\/span><\/li>\n<li><span data-contrast=\"auto\">Integrate shared contacts and calendars with popular CRM platforms<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/li>\n<\/ul>\n<h2 aria-level=\"2\"><span class=\"ez-toc-section\" id=\"Supported_CRM_Connectors\"><\/span><b><span data-contrast=\"none\">Supported CRM Connectors<\/span><\/b><span data-ccp-props=\"{&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:200,&quot;335559739&quot;:0}\">\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span data-contrast=\"auto\">CiraHub\u00a0supports synchronization with the following CRMs:<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"auto\">Salesforce<\/span><\/li>\n<li><span data-contrast=\"auto\">HubSpot<\/span><\/li>\n<li><span data-contrast=\"auto\">ActiveCampaign<\/span><\/li>\n<li><span data-contrast=\"auto\">Pipedrive<\/span><\/li>\n<li><span data-contrast=\"auto\">Zoho CRM<\/span><\/li>\n<li><span data-contrast=\"auto\">Procore<\/span><\/li>\n<li><span data-contrast=\"auto\">DealCloud<\/span><\/li>\n<li><span data-contrast=\"auto\">QuickBooks<\/span><span data-ccp-props=\"{&quot;134233118&quot;:false,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Clio<\/span><span data-ccp-props=\"{&quot;134233118&quot;:false,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Workday<\/span><span data-ccp-props=\"{&quot;134233118&quot;:false,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Everbridge<\/span><span data-ccp-props=\"{&quot;134233118&quot;:false,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Copper<\/span><span data-ccp-props=\"{&quot;134233118&quot;:false,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<\/ul>\n<h2 aria-level=\"2\"><span class=\"ez-toc-section\" id=\"Find_the_Right_Solution_Before_EWS_Is_Turned_Off\"><\/span><strong>Find the Right Solution Before EWS Is Turned Off<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Public Folder dependencies don\u2019t have to become a disruption. Find a solution that helps you replace EWS\u2011based integrations, migrate to shared mailboxes or CRMs, and maintain reliable contact and calendar sync across devices &#8211; before October 2026.<br aria-hidden=\"true\" \/><b><\/b><\/p>\n<p><a href=\"https:\/\/cirahub.com\/\"><b>Find a solution with CiraHub<\/b><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microsoft has officially announced the retirement of Exchange Web Services (EWS) for Exchange Online, with the service being fully disabled on October 1, 2026. This change has important implications for organizations that rely on third-party applications accessing Public Folder data, especially contacts and calendars.\u00a0 What is Changing?\u00a0 EWS has long been used by third-party applications [&hellip;]<\/p>\n","protected":false},"author":44,"featured_media":46654,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_nextfly_llmd_date_locked":false,"footnotes":""},"categories":[1478,83,72,3305],"tags":[13371,13570,13571,55],"ppma_author":[13555],"class_list":["post-67521","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog-articles","category-news","category-public-folder-sync","category-public-folders","tag-cirahub","tag-ews","tag-exchange-web-services","tag-public-folders"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Microsoft Is Deprecating Exchange Web Services (EWS): What This Means for Public Folder Integrations &#8212; CiraSync<\/title>\n<meta name=\"description\" content=\"Microsoft is retiring EWS for Exchange Online in Oct 2026. 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