Merge on premises and o365 mailbox
Merging on-premises and Office 365 mailboxes involves integrating the two environments to provide a seamless user experience. Here's a step-by-step guide to help you achieve this:
Prerequisites:
- You have an existing on-premises Exchange organization.
- You have an Office 365 tenant with Exchange Online.
- You have a hybrid deployment setup (if not, you can set it up using the Microsoft Hybrid Configuration Wizard).
Step 1: Prepare your on-premises environment
- Ensure that your on-premises Exchange organization is running Exchange 2013 or later.
- Verify that your on-premises Exchange organization is configured for hybrid deployment.
- Make sure that your on-premises Exchange organization is synchronized with Azure Active Directory (AAD) using Azure AD Connect.
Step 2: Prepare your Office 365 environment
- Ensure that your Office 365 tenant is running Exchange Online.
- Verify that your Office 365 tenant is configured for hybrid deployment.
- Make sure that your Office 365 tenant is synchronized with AAD using Azure AD Connect.
Step 3: Migrate mailboxes
You can use the following methods to migrate mailboxes from on-premises to Office 365:
- Cutover migration: This method involves migrating all mailboxes at once, and then switching the DNS records to point to Office 365. This method is suitable for small to medium-sized organizations.
- Staged migration: This method involves migrating mailboxes in batches, and then switching the DNS records to point to Office 365. This method is suitable for larger organizations.
- Hybrid migration: This method involves migrating mailboxes from on-premises to Office 365 using the Microsoft Hybrid Configuration Wizard. This method is suitable for organizations with a mix of on-premises and cloud-based users.
Step 4: Configure mailbox routing
After migrating mailboxes, you need to configure mailbox routing to ensure that mail flows correctly between on-premises and Office 365. You can use the following methods:
- Hybrid Mailbox Routing: This method involves configuring mailbox routing using the Microsoft Hybrid Configuration Wizard.
- Transport Rules: This method involves creating transport rules to route mail between on-premises and Office 365.
Step 5: Verify mailbox functionality
After completing the migration and configuring mailbox routing, verify that mailbox functionality is working as expected. You can use the following methods:
- Test mail flow: Send test emails from on-premises to Office 365 and vice versa to verify that mail is flowing correctly.
- Verify mailbox access: Verify that users can access their mailboxes from both on-premises and Office 365.
Additional considerations:
- Public Folder migration: If you have public folders in your on-premises environment, you'll need to migrate them to Office 365 using the Microsoft Hybrid Configuration Wizard.
- Calendar and contact migration: If you have calendar and contact data in your on-premises environment, you'll need to migrate them to Office 365 using the Microsoft Hybrid Configuration Wizard.
- Security and compliance: Ensure that your organization's security and compliance policies are aligned with the hybrid environment.
By following these steps, you can successfully merge your on-premises and Office 365 mailboxes, providing a seamless user experience for your users.