{
 "categories": [
  "email",
  "enterprise"
 ],
 "deployment": "on-prem",
 "evidence": [
  {
   "date": "2026-08-16",
   "fact": "homepage",
   "note": "Microsoft's Exchange documentation separates self-hosted Exchange Server planning, deployment, administration, PowerShell, and development from Exchange Online.",
   "source": "https://learn.microsoft.com/en-us/exchange/",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "platforms",
   "note": "Exchange Server 2019 and Subscription Edition have explicit Windows Server, Active Directory, .NET, hardware, network, and client requirements.",
   "source": "https://learn.microsoft.com/en-us/exchange/plan-and-deploy/system-requirements",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "license",
   "note": "Exchange Server Subscription Edition is commercially licensed per running server instance with client access licenses; subscription licenses or active Software Assurance are required.",
   "source": "https://www.microsoft.com/licensing/terms/en-US/productoffering/ExchangeServer/MPSA",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.api.exists",
   "note": "Exchange Web Services is a cross-platform API for mailbox messages, meetings, contacts, folders, and other Exchange store objects on on-premises Exchange.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/ews-applications-and-the-exchange-architecture",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.api.kinds[0]",
   "note": "EWS sends SOAP XML messages through HTTP or HTTPS and publishes WSDL and XSD contracts.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/ews-applications-and-the-exchange-architecture",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.api.kinds[1]",
   "note": "The Exchange Autodiscover service resolves mailbox version and active mailbox-server location for client applications.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/ews-applications-and-the-exchange-architecture",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.api.auth[0]",
   "note": "Microsoft documents NTLM as an on-premises-only EWS authentication option integrated with domain credentials.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/authentication-and-ews-in-exchange",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.api.auth[1]",
   "note": "Basic authentication remains available for on-premises EWS compatibility but Microsoft requires SSL in its protocol guidance and no longer recommends Basic for new applications.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/ews-applications-and-the-exchange-architecture",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.api.coverage",
   "note": "EWS exposes mailbox folders and items, email, calendars, contacts, search, availability, delegates, attachments, synchronization, subscriptions, and related store operations.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/ews-client-features",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.sdk",
   "note": "Microsoft documents the .NET EWS Managed API and direct EWS development; the managed client remains useful but is a mature legacy-shaped surface.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/setting-up-your-exchange-application-development-environment",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.sdk.languages",
   "note": "The EWS Managed API is a Microsoft .NET client documented with C# tooling and examples.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/setting-up-your-exchange-application-development-environment",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.cli.exists",
   "note": "The Exchange Management Shell is Microsoft's Windows PowerShell command-line interface for automating Exchange Server administration.",
   "source": "https://learn.microsoft.com/en-us/powershell/exchange/exchange-management-shell",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.extensibility.scripting",
   "note": "Exchange supports scripted administration through local or remote Exchange Management Shell sessions and mailbox applications through EWS and Autodiscover.",
   "source": "https://learn.microsoft.com/en-us/powershell/exchange/exchange-management-shell",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.extensibility.webhooks",
   "note": "EWS supports streaming, pull, and push notification subscriptions; push notifications call a client web-service address, while Microsoft generally recommends streaming notifications.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/notification-subscriptions-mailbox-events-and-ews-in-exchange",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.data_access.export",
   "note": "EWS returns strongly typed mailbox data in SOAP XML responses, and Exchange cmdlets return structured .NET objects for administration and export.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/ews-applications-and-the-exchange-architecture",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "modalities.data_access.import",
   "note": "Authorized EWS requests and Exchange cmdlets create and update mailbox items, recipients, connectors, databases, groups, and server configuration.",
   "source": "https://learn.microsoft.com/en-us/powershell/exchange/exchange-management-shell",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "verdict.scores.api",
   "note": "EWS and Autodiscover give broad on-premises mailbox coverage with notifications and a stable schema, but SOAP, legacy client tooling, version targeting, topology, and older on-premises authentication add substantial integration cost.",
   "source": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-server-development",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "verdict.scores.cli",
   "note": "Microsoft states the Exchange Management Shell manages every aspect of Exchange, including every graphical-tool task and bulk operations, with structured objects and RBAC-scoped commands.",
   "source": "https://learn.microsoft.com/en-us/powershell/exchange/exchange-management-shell",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "freshness.watch[0].url",
   "note": "Opened and verified as the current Exchange Server Subscription Edition feature, servicing, and upgrade reference.",
   "source": "https://learn.microsoft.com/en-us/exchange/new-features/new-features",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "freshness.watch[1].url",
   "note": "Opened and verified as the current Exchange Server 2019 and Subscription Edition platform and coexistence requirements.",
   "source": "https://learn.microsoft.com/en-us/exchange/plan-and-deploy/system-requirements",
   "tier": "declared"
  },
  {
   "date": "2026-08-16",
   "fact": "freshness.watch[2].url",
   "note": "Opened and verified as the current Exchange Server PowerShell coverage, installation, remoting, and RBAC overview.",
   "source": "https://learn.microsoft.com/en-us/powershell/exchange/exchange-management-shell",
   "tier": "declared"
  }
 ],
 "freshness": {
  "last_verified": "2026-08-16",
  "volatility": "medium",
  "watch": [
   {
    "type": "docs",
    "url": "https://learn.microsoft.com/en-us/exchange/new-features/new-features"
   },
   {
    "type": "docs",
    "url": "https://learn.microsoft.com/en-us/exchange/plan-and-deploy/system-requirements"
   },
   {
    "type": "docs",
    "url": "https://learn.microsoft.com/en-us/powershell/exchange/exchange-management-shell"
   }
  ]
 },
 "homepage": "https://learn.microsoft.com/en-us/exchange/",
 "id": "microsoft-exchange-server",
 "license": "commercial",
 "modalities": {
  "agent_docs": {
   "llms_txt": "unknown"
  },
  "api": {
   "auth": [
    "ntlm",
    "basic-over-tls"
   ],
   "coverage": "full",
   "docs": "https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/start-using-web-services-in-exchange",
   "exists": true,
   "kinds": [
    "soap",
    "autodiscover"
   ]
  },
  "cli": {
   "exists": true
  },
  "computer_use": {
   "issues": [],
   "viability": "unknown"
  },
  "data_access": {
   "export": [
    "ews-xml",
    "powershell-objects"
   ],
   "import": [
    "ews-xml",
    "powershell-objects"
   ]
  },
  "extensibility": {
   "scripting": [
    "exchange-management-shell",
    "ews",
    "autodiscover"
   ],
   "webhooks": true
  },
  "integrations": {
   "make": "unknown",
   "n8n": "unknown",
   "power_automate": "unknown",
   "zapier": "unknown"
  },
  "mcp": {
   "first_party": "unknown",
   "third_party": [],
   "verdict": "unknown"
  },
  "rpa": {
   "drivability": "unknown",
   "notes": "No repeatable UI probe was run. EWS and the Exchange Management Shell provide supported mailbox and administrative automation without controlling the Exchange admin center.",
   "ui_stack": [
    "web-dom",
    "windows-native"
   ],
   "vendor_support": []
  },
  "sdk": {
   "exists": true,
   "languages": [
    "csharp"
   ],
   "official": true
  }
 },
 "name": "Microsoft Exchange Server (on-prem)",
 "platforms": [
  "windows"
 ],
 "related": {
  "alternatives": [
   "exchange-online",
   "hcl-notes",
   "zimbra"
  ],
  "our_products": []
 },
 "schema_version": 1,
 "score_version": 1,
 "status": "active",
 "vendor": "Microsoft",
 "verdict": {
  "best_path": "cli",
  "scores": {
   "api": 7,
   "cli": 9,
   "computer_use": null,
   "integrations": null,
   "mcp": null,
   "overall": 9,
   "rpa": null
  },
  "summary": "Microsoft Exchange Server is the self-hosted Exchange boundary; Microsoft Graph is the preferred mailbox API for Exchange Online and is not a substitute for on-premises Exchange automation. On-premises mailbox and calendar applications use Exchange Web Services, a cross-platform SOAP and XML API over HTTP or HTTPS with Autodiscover, broad item and folder access, and streaming, pull, or callback-based push notifications. EWS supports NTLM for on-premises servers and retains Basic authentication only as a discouraged compatibility path that must run over TLS. The strongest administration path is the Exchange Management Shell. Microsoft states it manages every aspect of Exchange, including all graphical-tool tasks and bulk operations, and returns structured .NET objects. It runs through the installed management tools or remote Windows PowerShell and WinRM; there is no Microsoft Exchange Server module in the PowerShell Gallery. Exchange role-based access control limits the cmdlets and parameters available to an administrator. EWS is mature but its developer documentation and managed .NET client are legacy-shaped, and schema version, server version, topology, TLS, RBAC, and mailbox impersonation must be pinned. Exchange Server Subscription Edition also requires active subscription rights or Software Assurance. An on-premises Exchange-specific first-party MCP server and a repeatable computer-use result were not established.\n"
 }
}