Zoho Mail to Office 365 Migration
Zoho to Office 365 migration becomes essential when businesses move beyond the basic capabilities of Zoho Mail. Although Zoho works well for small teams with features like custom domains, email filtering, and eDiscovery, it may start to feel restrictive as organizations expand, especially in terms of storage capacity, third-party integrations, and advanced collaboration tools.
On the other hand, Microsoft Office 365 delivers a robust and scalable productivity platform featuring tools such as OneDrive, Microsoft Teams, and secure cloud storage. With smooth integration across services, enterprise-level security, and advanced collaboration features, it stands out as a reliable solution for organizations looking to enhance productivity and strengthen teamwork.

To simplify and secure the migration experience, EdbMails IMAP Migration Software provides an intuitive solution designed for businesses transitioning to Office 365. It streamlines the entire process with automation, requires minimal technical involvement, and ensures zero downtime, so users can continue their work without disruption.
EdbMails maintains complete email integrity by preserving metadata such as timestamps, sender and recipient details, subject lines, and the original folder hierarchy, ensuring that no information or context is lost. It also enables simultaneous migration of multiple mailboxes, helping larger organizations save significant time and effort. With built-in protection against data corruption and flexible options for selective or phased migrations, EdbMails delivers a smooth, efficient, and dependable transition from Zoho to Office 365.
User Query
“Hello EdbMails Team, we are looking for a reliable way to fully migrate our Zoho Mail to Office 365, as we've recently encountered integration issues with Zoho. While it met our needs when our company was smaller, our growing team and evolving business requirements have made Office 365 a more suitable option. We would appreciate your assistance in migrating all our emails to ensure a smooth and complete transition.”
Planning Your Zoho Mail to Office 365 Migration
Planning is one of the most important steps before you begin migrating your data to Office 365. Prepare the environment to avoid potential risks and data loss. Here is a checklist of points to consider before you migrate.
- Make a list of everything you want to migrate including folders, permissions, emails, messages.
- Create and assign user mailboxes to the target Office 365 tenant you want to migrate.
- Determine how you want to migrate your mailboxes (manual method versus using specialized migration tools).
- Inform your users of the changes and request that they create a complete backup of their email data.
- Start the migration and verify the migration endpoint.
- Allocate time for post-migration activities to ensure your emails are properly routed to the new environment.
Zoho Mail to Office 365 Migration Prerequisites
For Zoho Mail server:- Make sure you have your Zoho Mail server hostname, port number, email address, and password ready.
- To find your IMAP settings in Zoho, go to ‘Settings’, then select ‘Mail Accounts’ and click on ‘IMAP’.
- If you plan to migrate multiple users, download the sample CSV file from EdbMails application and update the details such as email address, password, imap hostname and port number and save the CSV file.
- Before starting the migration from Zoho Mail to Office 365, make sure that mailboxes are ready for all your users and that each one has the right license.
You have two options:
- Let EdbMails automatically create the mailboxes for you.
- Or, if you prefer to set them up yourself, use the Office 365 Admin Center. You can follow the guides below to help you:
- If you have a custom email domain from Zoho to which you want to receive emails after the migration, you must add and verify the domain on Office 365.
Steps to add a custom domain to Office 365 and Steps to add DNS records to connect your domain.
- Configure Office 365 to send and receive large messages.
Follow the steps to increase the message size on Office 365 to 150MB.
Steps to migrate from Zoho Mail to Office 365
Step 1: Download and install EdbMails IMAP migration Software
- Download and install EdbMails on your computer.
- Launch the EdbMails application on your computer.
- Enter your registered email address and password, then click ‘Login’. If you’re using EdbMails for the first time, choose ‘Start Your Free Trial’ to proceed with the trial version.Note: The trial edition provides access to all core features and allows exporting up to 30 items per folder. To remove this restriction and enable unlimited exports, purchase a valid license from the official EdbMails website.After completing the purchase, close the application and open it again. Sign in with the same email address and password used during the license purchase to activate it successfully.
- Select the option ‘IMAP (Gmail, Outlook & more) Migration’
- Select ‘IMAP to Office 365 Migration’.
- You can proceed with the default job name or select ‘New Job’ if you prefer to create and customize your own job name.
Step 2: Connect the Source Zoho Mail Server
- To connect a single Zoho account for migration, click ‘Single User / Account Migration’, choose the suitable connection option such as ‘Connect to IMAP Server’ or ‘Connect to POP3 Server’. Click ‘Next’ to proceed.
- For a single user login, choose the correct IMAP host name for Zoho from the list or manually enter it (e.g., mail.userdomain.com).
- Then, fill in the email address and password.
- If you are adding a Gmail account, create an app password and use it instead of your standard account password.
- Next, click the 'Login’ button.
- To migrate multiple Zoho mailboxes at once, select ‘Multiple (bulk) Users/Accounts Migration’, choose the suitable connection method such as ‘Connect to IMAP Server’ or ‘Connect to POP3 Server’.
- Then proceed by clicking ‘Next’.
- Select the ‘IMAP Migration CSV File’ option to download the ‘Sample.CSV’ file, which will be saved to your local drive for future reference.
- Open the CSV file and enter the required details, including the email address, password, server name, and port number.
- After updating the CSV file, save it and close it.
- Next, click on the 'Load Modified CSV File' button, locate your updated file, select it, and open it to proceed.
Step 3: Select the Mailboxes or Folders to Migrate
- Choose one or more mailboxes or specific folders you wish to migrate.
- Then click ‘Next’ to continue.
Step 4: Connect to Target Office 365 Server
- Select the ‘Add New Connection’ option to establish a connection with your target Office 365 account.
- If you have previously set up a connection, you can choose it from the available list and click ‘Connect to Existing’ to proceed.
- EdbMails provides flexible migration options, allowing you to migrate primary mailboxes, archive mailboxes, and public folders seamlessly in a single solution.
- Choose the necessary connection options and click ‘Next’ to continue with authentication methods.
- Choose your preferred secure authentication method for the target Office 365.
- The login process takes place on the official Microsoft sign-in page, where your credentials are securely authenticated through OAuth 2.0, ensuring a safe and protected access experience.
- Click the ‘Login’ button.
- Authenticate on Microsoft sign-in page.
- After logging into your target Office 365 server, select how you’d like to load the mailboxes.
- EdbMails automatically loads mailboxes, making the setup process simple. Because of Microsoft API limits, the automatic option shows only up to 100 mailboxes at once.
- In larger environments or when you need to add specific mailboxes, you can choose the ‘Load Mailboxes using .CSV file’ option that allows manual selection and provides complete control over the process.
- Click ‘Next’ to proceed.
Step 5: Zoho to Office 365 mailboxes mapping
- Select a preferred option to map the source Zoho mailboxes and folders with their corresponding mailboxes and folders on the target Office 365 account.
- EdbMails lets you automatically create the required mailboxes in your target Office 365 account.
- It also automatically maps your source Zoho mailboxes and folders to the matching ones in Office 365, making large migrations easier to manage.
Step 6: Start IMAP to Office 365 migration operation
- Verify the mailbox mapping, then click the ‘Start Migration’ button to begin the migration process.
- Click the ‘View Logs’ button to access the full migration report. The report provides detailed information, including the mailbox mapping, an overall summary of the migration, and the item count for each mailbox and folder that was migrated.
Zoho Mail to Office 365 Post-Migration Tasks
- Step 1: Update the MX records to point to Office 365
Update the MX records to start receiving emails on your target Office 365 server. Also, make sure to configure the Autodiscover record so that Outlook can connect to the migrated mailboxes.
- Step 2: Set up a new Outlook profile for users in the new domain
If users experience issues connecting to Office 365 mailboxes, create and configure a new Outlook profile for each user in your domain.
- Step 1: Update the MX records to point to Office 365
Advantages of EdbMails to migrate Zoho mail to Office 365
- Migration of Multiple Mailboxes at Once
EdbMails allows simultaneous migration of multiple Zoho Mail accounts to Office 365, speeding up the process and ensuring businesses with many users can migrate without disrupting daily operations.
- Incremental Migration with No Duplicates
EdbMails offers an incremental migration feature, making it an ideal solution for migrating data to Office 365 in stages. It ensures that only new or updated items are migrated in subsequent transfers, eliminating the risk of duplicates.
- Selective Folder Migration for Prioritized Data Transfer
EdbMails offers the flexibility to choose specific folders for migration, enabling businesses to prioritize important emails. This selective approach ensures that only critical data is migrated, optimizing the migration process by excluding unnecessary or outdated information.
- Customizable Migration Filters for Precise Data Transfer
EdbMails provides advanced filtering options, allowing users to migrate data based on date range, email address, or subject. This precise control ensures that only relevant emails are migrated, making the migration process more efficient while minimizing the transfer of redundant data.
- Support for Primary and In-place Archive Mailboxes
EdbMails supports the migration of Zoho Mail emails to both primary and in-place archive mailboxes in Office 365. This dual migration feature helps maintain compliance, keeping important emails archived while ensuring active emails are accessible in the primary mailbox.
- Direct Folder Mapping for Seamless Organization
EdbMails enables direct folder mapping from Zoho Mail to Office 365 (e.g., Inbox to Inbox). This preserves the folder structure and organization during migration, ensuring users experience a smooth transition without needing additional post-migration reorganization.

