| Acuity Scheduling | Acuity Scheduling (Outlook and Office 365 calendar sync, via Cronofy) | Migration announced |
| ADITO | ADITO (Exchange calendar integration) | Moved to Microsoft Graph |
| Adobe | Adobe ColdFusion Exchange integration | Moved to Microsoft Graph |
| Airmail | Airmail | No public notice found |
| Alemba | Alemba Service Manager (ASM) email servers (incoming and outgoing) | Migration announced |
| Arctera | Arctera Unified Platform (Exchange Online Sync) | Migration announced |
| Augmentt | Augmentt Backup for Microsoft 365 (Exchange, Groups, Teams) | Migration announced |
| Automation Anywhere | Automation 360 (Email package, EWS option) | Migration announced |
| Axcient | x360Cloud | Moved to Microsoft Graph |
| ayfie | ayfie Exchange connector | Moved to Microsoft Graph |
| Barracuda | Barracuda Cloud Archiving Service | Migration announced |
| Barracuda | Barracuda Message Archiver | Migration announced |
| BlackBerry | BlackBerry Enterprise Mobility Server (BEMS) and BlackBerry Work notifications (Exchange Online) | Migration announced |
| BlueMail | BlueMail | No public notice found |
| BMC | BMC Helix Innovation Suite applications (Exchange Online email integration) | Migration announced |
| Bold Group | Manitou Publisher and MediaGateway Email Connector | No public notice found |
| BusyMac | BusyCal for iOS (Office 365 accounts) | Moved to Microsoft Graph |
| BusyMac | BusyCal for Mac (Office 365 accounts) | Moved to Microsoft Graph |
| CalendarBridge | CalendarBridge | Moved to Microsoft Graph |
| CARET | AbacusLaw by CARET | Migration announced |
| CARET | Amicus Attorney by CARET | Migration announced |
| CARET | OfficeTools by CARET | Migration announced |
| Check Point | Check Point Email Security (formerly Avanan, Harmony Email and Collaboration) | Moved to Microsoft Graph |
| Checkmk | Checkmk email plug-ins (Exchange Online mailboxes) | Migration announced |
| CiraSync | CiraSync Cloud (Public Folder sync tunnels) | Retired |
| Cireson | SMLets Exchange Connector for System Center Service Manager (and the SCSM Microsoft Exchange Connector) | Migration announced |
| Cirrus Insight | Cirrus Insight | Moved to Microsoft Graph |
| Cisco | Cisco Secure Email Threat Defense | Moved to Microsoft Graph |
| Cisco | Cisco Unity Connection (Unified Messaging with Microsoft 365) | Migration announced |
| Clevertouch | CleverLive Room Booking | Moved to Microsoft Graph |
| CloudAlly (OpenText) | CloudAlly Microsoft 365 backup | Migration announced |
| Coconut Software | Coconut Microsoft Exchange calendar integration | Migration announced |
| CompanionLink | CompanionLink | Moved to Microsoft Graph |
| Continia | Continia Document Capture (email import) | Migration announced |
| Creatio | Creatio email and calendar integration (Exchange / Microsoft 365) | Migration announced |
| Crestron | Crestron room scheduling panels and AirMedia (Microsoft 365 scheduling) | Migration announced |
| CyberFortress | CyberFortress Microsoft 365 backup (Veeam-based) | Migration announced |
| DavMail | DavMail Gateway | Moved to Microsoft Graph |
| Deskpro | Deskpro | Moved to Microsoft Graph |
| DocuWare | DocuWare Connect to Mail | Migration announced |
| Eptura (Condeco) | Eptura Condeco Room Screen v2 | Migration announced |
| Eptura (Teem) | Teem calendar integration (Office 365 delegate) | Moved to Microsoft Graph |
| ESET | ESET Mail Security for Microsoft Exchange Server (Microsoft 365 on-demand scan) | Migration announced |
| Evoko (Biamp) | Evoko Home (Liso room manager server) | Moved to Microsoft Graph |
| Freshworks | Freshservice | Moved to Microsoft Graph |
| Front | Front | Moved to Microsoft Graph |
| Genesys | Genesys PureConnect (Office 365 mailbox access) | Migration announced |
| GFI Software | GFI Archiver AI | Migration announced |
| GoBright | GoBright room booking and visitor management | Moved to Microsoft Graph |
| Gong | Gong | Moved to Microsoft Graph |
| Google | Google Workspace Calendar interoperability with Microsoft Office 365 (Exchange availability) | Migration announced |
| Ground Labs | Enterprise Recon (Exchange Online (EWS) scan target) | Migration announced |
| Halo | HaloPSA / HaloITSM Exchange calendar sync | Moved to Microsoft Graph |
| HENNGE | HENNGE One Cloud Protection (Exchange Online protection) | Migration announced |
| HubSpot | HubSpot inbox and calendar connection | Moved to Microsoft Graph |
| Huntress | Huntress Managed ITDR | Moved to Microsoft Graph |
| IBM | IBM Cloud Pak for AIOps (Microsoft EWS Probe) | Migration announced |
| IBM | IBM MaaS360 Mail (iOS and Android) | Migration announced |
| Ideagen | Ideagen Mail Manager | Moved to Microsoft Graph |
| Imagicle | Imagicle UCX Suite (Agent and Attendant Console M365 calendar, email sending, Mail2Fax) | Migration announced |
| Infor | Infor LN UI Exchange Synchronizer | Migration announced |
| Jitbit | Jitbit Helpdesk | Moved to Microsoft Graph |
| Laserfiche | Laserfiche Workflow | No public notice found |
| Libraesva | Libraesva Email Archiver | Moved to Microsoft Graph |
| ManageEngine | ManageEngine Supportcenter Plus (Exchange Online mailboxes) | Moved to Microsoft Graph |
| ManageEngine | ServiceDesk Plus (on-premises) | Moved to Microsoft Graph |
| ManageEngine | ServiceDesk Plus MSP (Exchange Online mailboxes) | Migration announced |
| Microsoft | Microsoft Teams Panels | Migration announced |
| Microsoft | Microsoft Teams Phones | Migration announced |
| Microsoft | Skype for Business Server (hybrid with Exchange Online) | Migration announced |
| Microsoft | System Center Service Manager (Exchange Connector) | Migration announced |
| Missive | Missive | Moved to Microsoft Graph |
| MYOB | MYOB Acumatica Exchange integration | Moved to Microsoft Graph |
| N-able | Cove Data Protection (Microsoft 365 backup) | Moved to Microsoft Graph |
| NetDocuments | ndMail | Moved to Microsoft Graph |
| Netwrix | Netwrix Access Analyzer | No public notice found |
| Netwrix | Netwrix Auditor | Moved to Microsoft Graph |
| Nintex | Nintex Automation K2 (Exchange Online feature) | Migration announced |
| Nuix | Nuix Microsoft 365 connector | Moved to Microsoft Graph |
| Nylas | Nylas Email API (Exchange) | Moved to Microsoft Graph |
| OpenText | OpenText IDOL Exchange Web Service Connector | No public notice found |
| Outreach | Outreach Microsoft Graph mailbox integration | Moved to Microsoft Graph |
| Perception Point | Perception Point (Mail App) | Moved to Microsoft Graph |
| Pexip | Pexip Infinity One-Touch Join (Office 365 calendars) | Migration announced |
| Pipedrive | Pipedrive email sync | No public notice found |
| Planon | Connect for Outlook (C4O), replaced by Connect for Calendar (C4C) | Moved to Microsoft Graph |
| Reclaim.ai | Reclaim.ai | Moved to Microsoft Graph |
| Retarus | Retarus Post-Delivery Protection | Moved to Microsoft Graph |
| Revenue Grid | Revenue Grid | Moved to Microsoft Graph |
| Rise Up | Rise Up (Outlook calendar sync) | Moved to Microsoft Graph |
| Riva | Riva Sync (Exchange Online) | Migration announced |
| Sage | Sage CRM (Exchange Online integration) | Migration announced |
| Salesloft | Salesloft Microsoft Exchange email client | No public notice found |
| SaneBox | SaneBox | Moved to Microsoft Graph |
| SavvyCal | SavvyCal | Moved to Microsoft Graph |
| Sherweb | M365 Backup powered by Veeam (Sherweb) | Migration announced |
| SolarWinds | SolarWinds Web Help Desk (incoming email, Microsoft 365) | Migration announced |
| SoSafe | Phishing Report Button | Moved to Microsoft Graph |
| Square 9 | GlobalCapture | Migration announced |
| SysAid | SysAid calendar sync | Moved to Microsoft Graph |
| Tech-Arrow | ContentAccess email archive (Microsoft 365 connections) | Migration announced |
| Templafy | Templafy Email Signature Server (Microsoft 365) | Moved to Microsoft Graph |
| Texada Software | Equipment CRM | Migration announced |
| TOPdesk | TOPdesk mail import | Moved to Microsoft Graph |
| Trend Micro | Trend Micro Cloud App Security (Exchange Online provisioning) | No public notice found |
| Wealthbox | Wealthbox CRM | Migration announced |
| webCRM | webCRM (Exchange/Outlook integration) | Migration announced |
| WithSecure | WithSecure Collaboration Protection | Migration announced |
| Workspace 365 | Workspace 365 | Moved to Microsoft Graph |
| Xink | Xink Outlook Add-in | Moved to Microsoft Graph |
| Yeastar | Yeastar Workplace | No public notice found |
| YouCanBook.me | YouCanBookMe | Moved to Microsoft Graph |
| Zendesk | Zendesk Microsoft Exchange connector | Moved to Microsoft Graph |
| Zensai | Learn365 (Select room when creating or managing sessions) | Migration announced |
| Zoom | Zoom Workplace calendar and contacts integration (Microsoft 365) | Moved to Microsoft Graph |