In the contemporary landscape, emails have evolved into a vital means of communication. Rapid technological progress is revolutionizing every facet of the business world, compelling web-based email tools to continually redefine their standards and meet the expectations of the next generation of users. Nowadays, whether you're a business or an individual, you have the freedom to select the email platform that suits you best. Technological advancements are compelling users to move away from outdated email services and transition to more sophisticated, web-based email clients.

Based on a 2016-17 Gartner Research study, it was revealed that nearly 78% of current Yahoo users contemplated transitioning to alternative web-based email applications. Among the prominent choices emerging from this research was Microsoft Office 365. Yahoo Mail has struggled to meet the evolving needs of contemporary corporate and individual users, contributing to its declining popularity in recent years.

Why Users are Sacrificing Yahoo Email Services for its Counterparts?

Yahoo Mail is a well-established web-based email client solution; however, it has been experiencing a steady decline in its user base. This decline can be attributed to the platform's failure to offer innovative and exciting features, which other web-based email applications readily provide with greater flexibility. The absence of cutting-edge features in Yahoo Mail has prompted a significant number of users to migrate to Office 365.

Business man
Instant Solution

Get Kernel IMAP to Office 365 an automated tool to transfer complete Yahoo mailbox data into Office 365 and Exchange server. The software supports various IMAP clients, including Gmail, Yahoo, Zafara, Zimbra, Postfix, Incredimail etc.

Connect Yahoo to Office 365 Manually

When discussing manual methods, it's important to note that there isn't a straightforward way to migrate Yahoo emails to an Office 365 account. To achieve this, the Yahoo data must first be converted into the PST format. Once the data is in PST format, it can then be transferred to an Office 365 user mailbox. Let's proceed by following these steps:

A. Migrate Yahoo Mail to Outlook PST format

In order to export Yahoo Mail to PST, you need to have the adequate knowledge of Yahoo Mail features, or you can follow the below steps:

  • Step-1. Change the Account Security of the Yahoo Email. Click on Allow apps that use less secure sign-in option in it. Change the Account Security
  • Step-2. Open Microsoft Outlook > File > Info > Add Account option > Manually Configure Server Settings > Next to proceed further. Manually Configure Server Settings
  • Step-3. Go to Add New Account > select POP3 or IMAP > Next. Type necessary login details - Yahoo email and password. Type necessary login details
  • Step-4. Enter in the incoming mail server field and in the outgoing mail server field. Enter
  • Step-5. Select More Settings > POP and IMAP Account Settings > Assign an Account Name.
  • Step-6. Select the Outgoing Server tab > click on Use Same Settings as My Incoming Mail Server and My SMTP Requires Authentication.
  • Step-7. In the Advanced tab > POP3 server: 995 and for SMTP server: 465. Choose SSL as the encryption type. Subsequently, click on 'This Server Requires an Encrypted Connection.'
  • Step-8. Choose OK > Next > Finish > Exit and Restart Outlook.
  • Step-9. Click on Send/Receive option > Select Send/Receive All Folders. Now all the Yahoo Mail folders will be imported in MS Outlook.
  • Step-10. Visit the Default location for confirmation and check whether the exported Yahoo file is saved in .pst format or not.
B. Migrate Yahoo Mail form PST file to Exchange Online Account

When considering system requirements and compatibility, there are two approaches available for migrating Yahoo Mail PST files to Office 365.

  1. Network Upload Method - Involves using the Azure AzCopy and Import PST tool to import the PST files.
  2. Drive Shipping Method - Involves creating an import job with SAS URL, and then shipping the hard drive containing the PST files to Microsoft Center.

Both of these methods come highly recommended by Microsoft. Nevertheless, they may pose a challenge for regular Yahoo users, as they require a certain level of technical proficiency to utilize effectively.

Limitations of manual Yahoo Mail to Office 365 migration methods

The transition from Yahoo to an Office 365 account can be a challenging endeavor, fraught with the potential for errors. Moreover, this migration process can be quite time-consuming due to its two-step nature, involving the initial conversion of Yahoo data into the PST format and subsequent importation of PST files into Office 365. Unfortunately, this can become a protracted and onerous task, particularly for users lacking technical expertise.

If you're considering migrating your emails from a Yahoo Pro or Yahoo Small Business account to Office 365, you may find the need for third-party tools or utilities. In this regard, we recommend trying the Kernel IMAP to Office 365 tool. This powerful solution offers an array of features, including incremental mailbox migration and smart filtering capabilities, enabling you to selectively transfer mailbox data based on criteria such as date ranges and item types (emails, contacts, and more).

A few noteworthy features of this tool include:

  • Facility to migrate to mailboxes, archive mailboxes & public folder.
  • It skips already migrated files and avoids redundancy in data migration from source to destination.
  • It ensures complete accuracy and security of data throughout the migration process.
  • Supports both hosted, on-premises, and cloud Exchange deployments.
Migrate Yahoo mail to Office 365 by Using Kernel IMAP to Office 365 Tool

Let's now delve into the operation of this sophisticated tool for migrating Yahoo Mail to Office 365. To begin, you should initiate the process by downloading and installing the Kernel IMAP to Office 365 tool on your system. Once this installation is complete, simply double-click on the software icon to launch it.

  1. On the welcome screen of the Kernel IMAP to Office 365 tool, click Add under Add Source section. Kernel IMAP to Office 365
  2. Now, add the Yahoo mail account login details with Server name, then click Add. add the Yahoo mail account
  3. The account will get added as source. Noe, click Add under Add Destination section. Add Destination
  4. Now add Office 365 account details to which you want to migrate Yahoo Mail data. After adding the login details, click Add. add Office 365 account details
  5. Now, map the added source account to the added destination account. Click Set Filter and Migrate. map the added source account
  6. Choose the folders from Office 365 account and click Migrate option. Choose the folders
  7. In the Filter Selection section, add different kind of filter options for selective data migration from Yahoo Mail account to Office 365 account. Click I am OK, Start Migration. Filter Selection section
  8. The migration process will get start immediately and will complete within minutes. After successful migration, you will get a message notification like this. migration process

Hence, the migration process from Yahoo Mail account to Office 365 account is successfully completed.


Transitioning your data from Yahoo Mail to Office 365 can be quite intricate due to its multi-step nature, involving various prerequisites and procedures. Moreover, the manual process for migrating from Yahoo Mail to Office 365 is both time-consuming and complex. Consequently, we recommend that users explore third-party solutions like Kernel IMAP to Office 365 for a smoother Yahoo to Office 365 migration experience.