Exchange Connection Problems

Does Microsoft 365 Include a Hosted Exchange Mail Server?

Kushani Nimanthika Sep 28, 2026 869 views

Question details

The user wants to know whether Microsoft 365 includes a hosted Exchange server and if a custom domain mailbox currently hosted by a third party can be moved to Microsoft's service.

Does Microsoft 365 Include a Hosted Exchange Mail Server?

Product: Microsoft 365
Device & OS: not provided
Scenario: Migrating a personal or business domain mailbox from a third-party hosting provider to Microsoft 365.
Observed behavior: Seeking clarification on the inclusion of Exchange Online in Microsoft 365 subscriptions and the technical possibilities for custom domain email migration.

Before you start

Before migrating your email, verify that your current Microsoft 365 subscription is a business plan that includes Exchange Online, and ensure you have administrative access to your domain registrar's DNS settings.

Solution 1Recommended

Migrate Your Custom Domain to Exchange Online

Use this method if your Microsoft 365 business plan includes Exchange Online and you want to utilize advanced features like shared calendars, contacts, and business-class email routing.

Qualifying Microsoft 365 business plans come with Exchange Online natively. By adding your custom domain to your Microsoft 365 tenant, you can fully migrate your mailboxes away from your third-party provider.

Sign in to Microsoft 365 Admin Center

Add Your Custom Domain

Navigate to 'Settings' and click on 'Domains'. Click 'Add domain' and enter the custom domain name you are currently using with your third-party host.

Verify Domain Ownership

Follow the prompts to add a TXT or MX record to your domain's DNS host (like GoDaddy or Cloudflare) to prove you own the domain.

Update DNS Records for Email Routing

Once verified, create the necessary user mailboxes in Microsoft 365, and then update your MX records to point to Exchange Online so new emails route directly to Microsoft.

Migrate Your Custom Domain to Exchange Online

DNS Propagation Time: Keep in mind that DNS changes, especially MX records, can take up to 48 hours to fully propagate across the internet.

Solution 2

Keep Your Third-Party Host and Configure Outlook via IMAP/POP

Ideal if you prefer to keep your email hosted with your current provider but still want to manage your messages using the Outlook desktop client included in Microsoft 365.

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1. Download the Installer: Visit the official WPS website and download the free WPS Office installer for your operating system.
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Frequently Asked Questions

Which Microsoft 365 plans include Exchange Online?

Exchange Online is included in most Microsoft 365 business plans, such as Business Basic, Business Standard, Business Premium, and Enterprise (E3/E5) plans. Microsoft 365 Family and Personal plans do not include business-class Exchange hosting.

What is the difference between Exchange Online and IMAP?

Exchange Online provides robust two-way synchronization for emails, business calendars, contacts, tasks, and shared mailboxes across all devices. IMAP, offered by most third-party hosts, primarily synchronizes only email messages.

Can I keep my current email address if I move to Microsoft 365?

Yes. By adding and verifying your custom domain in the Microsoft 365 admin center, you can recreate your existing email addresses inside Exchange Online and continue using them seamlessly.

Will I lose my old emails when migrating to Exchange Online?

Not if you perform a proper migration. You can use the Microsoft 365 admin center's data migration tools to pull your historical emails from your previous host via IMAP before you change your MX records.

Outlook & Email Problems