KamoCRM

KamoCRM + Microsoft Exchange

On-premises Exchange integration via EWS

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Overview

Connect on-premises Microsoft Exchange (or hybrid Exchange) to KamoCRM via Exchange Web Services (EWS). Emails with known contacts log to the contact record. Distinct from the Microsoft 365 integration, which handles Exchange Online through Graph API — this one is for organizations running Exchange on their own servers.

Common use cases

On-premises Exchange deployments

Organizations with compliance or data-residency requirements running Exchange Server 2016/2019/2022 on their own infrastructure.

Hybrid Exchange (on-prem + M365)

Hybrid configurations where mailboxes span on-premises and cloud. KamoCRM connects to whichever side hosts the mailbox.

Government / regulated environments

Air-gapped or sovereign-cloud deployments that can't use Exchange Online.

Setup

  1. 1Navigate to Settings → Email → Provider in KamoCRM
  2. 2Select Microsoft Exchange as the provider
  3. 3Enter your EWS endpoint URL (typically https://mail.yourdomain.com/EWS/Exchange.asmx)
  4. 4Provide service account credentials with EWS Impersonation rights
  5. 5Select mailboxes to sync
  6. 6Test the connection

What data syncs

Inbound and outbound email threads
Attachment references
Calendar items (if enabled)
Contacts (optional)

Questions about Microsoft Exchange

What Exchange versions are supported?
Exchange Server 2016 and newer with EWS enabled. Older versions (2010, 2013) may work but aren't officially tested.
What about Exchange Online (Office 365)?
For Exchange Online, use the Microsoft 365 integration (Graph API). This integration is specifically for on-premises or hybrid Exchange.
Is EWS Impersonation required?
Yes, to sync on behalf of users without per-user credentials. Your Exchange admin grants the service account ApplicationImpersonation rights scoped to the relevant mailbox set.
What about modern auth (OAuth) vs basic auth?
Modern Hybrid Exchange typically supports OAuth via Azure AD. Basic auth over EWS is also supported for older on-prem deployments.

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KamoCRM + Microsoft Exchange Integration | EWS Email Sync | KamoCRM