Office 365 to Yahoo Mail migration

Are you planning to discontinue your Office 365 subscription and switch to a more cost-effective solution like Yahoo Mail? Do you want to move your important emails and data without losing access, structure, or security? If so, this guide will walk you through a clear and reliable process to migrate your Office 365 mailbox to Yahoo Mail.

Office 365 is a powerful productivity suite that includes tools like Outlook, Word, Excel, and SharePoint—ideal for organizations that need collaboration and advanced email features. However, the ongoing subscription cost may not be practical for all users, especially individuals or small businesses seeking a simpler, more budget-friendly option.

Yahoo Mail offers a compelling alternative: a free, user-friendly email platform with 1 TB of storage, smart organization features, a tabbed interface, and powerful search capabilities—all without requiring a paid plan.

Whether you're transitioning to a lightweight email solution, consolidating accounts, or simply moving away from enterprise software, migrating from Office 365 to Yahoo Mail can be a strategic and practical decision.

To simplify and secure this transition, EdbMails offers a reliable and feature-rich Office 365 Migration Tool that ensures smooth data transfer with zero data loss. It supports selective migration, automatic mailbox mapping, secure authorization via OAuth 2.0, and multi-factor authentication—making it the ideal solution for hassle-free migration.

Key features include incremental migration, automatic mailbox mapping, advanced filtering options, and detailed migration reports, allowing users to monitor and manage the entire migration with full control. EdbMails also intelligently addresses common challenges such as throttling, ensuring a seamless and uninterrupted transfer.

Whether migrating a single user or an entire organization, EdbMails delivers speed, precision, and complete data fidelity—making it a reliable choice for professionals moving from Microsoft 365 to Apple’s iCloud ecosystem.

To simplify and secure this transition, EdbMails offers a reliable and feature-rich Office 365 Migration Tool that ensures smooth data transfer with zero data loss. It supports selective migration, automatic mailbox mapping, secure authorization via OAuth 2.0, and multi-factor authentication—making it the ideal solution for hassle-free migration.

1. Best professional solution for Office 365 to Yahoo Mail migration

   For a seamless and secure Office 365 migration to Yahoo Mail, EdbMails Office 365 Migration Software stands out as the top professional solution. With its intuitive and user-friendly interface, it makes the migration process effortless for both technical and non-technical users. EdbMails is ISO 27001:2013 certified, guaranteeing high standards of data security throughout the migration. Its support for multilingual data ensures smooth handling of global email content, making it ideal for international users.

   The tool’s cost-effective licensing fits individuals, small businesses, and large organizations, providing excellent value without compromising performance. With features like selective data migration, automatic mailbox mapping, and reliable transfer accuracy, EdbMails delivers a smooth and risk-free Office 365 migration to Yahoo Mail.

2. Office 365 to Yahoo Mail migration: Pre-migration activities

   Before initiating the migration process from Office 365 to a Yahoo Mail server, ensure the following preparatory tasks are completed:

   • On the source Office 365 server side :
     1. For Auto Registration of the EdbMails application in Entra ID (Azure Active Directory), a global administrator account with an associated mailbox is required. If you prefer Manual Registration, you can use either a global admin account or any user account that has full mailbox access permissions.
     2. Assign the suitable Office 365 licenses for the mailboxes you wish to migrate

         Click here to assign Microsoft 365 licenses to user accounts

     3. To migrate Office 365 public folders, archive mailboxes and shared mailboxes, ensure that you configure them appropriately.

         Click here to create Office 365 Public folder and assign admin permissions.

         Click here to create Shared mailboxes on Office 365 and set the required permission.

         Click here to enable archive mailboxes on Office 365.

     4. Verify that you have enough bandwidth for Office 365 migration

         Click here for network and migration planning, performance factors and best practices for Office 365 migration.

     5. For large messages(items) migration, configure Office 365 to increase the message size limit.

         Click here for the steps to increase the message size on Office 365 to 150MB.

   • On the target IMAP server side :
     1. Get your Yahoo Mail account IMAP host name, port number, email address and password required for login.
     2. If you're migrating multiple mailboxes, download the sample CSV file from EdbMails and fill in the required details, including the email address, password, Yahoo Mail IMAP server hostname, and port number.

3. How to migrate emails from Office 365 to Yahoo Mail using EdbMails

   Step 1: Download and Install EdbMails software

   • Download and install the EdbMails application on your computer.
   • Launch the EdbMails software login with your email address and password or ‘Start Your Free Trial’ to begin.

      See EdbMails system requirements for Office 365 to Yahoo Mail migration

     

   Step 2: Select the Office 365 to IMAP migration option

   • Choose the ‘Office 365 Migration’ option and select ‘Office 365 to IMAP migration’.

     

   • Proceed with the default job name or click ‘New Job’ to change.

   Step 3: Connect to source Office 365 server

   • Click ‘Add New Connection’ to set up a new connection with the source Office 365 server, or choose ‘Connect to Existing’ to reuse a previously configured connection.
   • Choose the appropriate connection options and proceed by clicking ‘Next’.
   • Then, select your preferred authentication method and hit the ‘Login’ button to continue.

     

   • Sign in through the Microsoft authentication page and load the mailboxes.
   • Choose the mailboxes you want to migrate and click ‘Next’ to proceed.

     

       Connect to Office 365 server using secure modern authentication

   Step 4: Connect to target Yahoo Mail server

   • Select ‘Connect to IMAP’ or ‘Connect to POP3’ depending on your destination server. For a single user, choose ‘Single User / Account Migration’ and provide the target account details along with the IMAP host.
   • Click ‘Login’ to connect to the target mailbox, allow it to load, and then click ‘Next’ to move forward.

     

   • For bulk migration, choose ‘Multiple (Bulk) Users/Accounts Migration’ and proceed by clicking ‘Next’.

     

   • Download the sample CSV file and enter the necessary details such as email address, password, host name, and port number. Save and close the file after updating.
   • Click the ‘Browse CSV File’ button and upload the modified file. Check the loaded mailboxes and click ‘Next’ to continue.

     

   Step 5: Map Office 365 to Yahoo Mail mailboxes

   • Select the mailbox mapping option as needed.
   • EdbMails automatically maps Office 365 and Yahoo Mail mailboxes. You can also map them manually if needed.

     

   Step 6: Start the Office 365 to Yahoo Mail migration

   • Click ‘Start Migration’ to begin the transfer.
   • After completion, click ‘View Log’ to check the detailed migration report and verify the results on the target server.

     

4. Post migration activities

   Once the migration finishes, update your MX records to route incoming emails to the new destination server.

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Additional resources:

• Office 365 to Exchange Migration
• Office 365 Migration with same Domain
• Office 365 Group Migration
• Office 365 multiple mailbox migration
• Office 365 Server to Server Migration