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Migrate IMAP to Office 365 Like Pro (Easy Complete Guide)

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Published By Jamie Kaler 
Rollins Duke
Approved By Rollins Duke
Published On September 14th, 2026
Reading Time 7 Min Read

Transferring IMAP-based email server to Office 365 improves mailbox accessibility & collaboration. A successful migration involves more than copy-pasting emails from one account to another. If users choose Microsoft’s native IMAP migration, then they can only migrate emails from web-hosted email server to Microsoft Office 365. IMAP does not migrate contacts, calendars, tasks, or notes. The manual IMAP method also involve multiple technical steps. But this technique didn’t keep emails accurately & had folder mapping issues. In this blog, users get to know simple method to migrate IMAP to Office 365 account with easy tricks.

This updated tutorial helps users easily forward IMAP emails to Microsoft Office 365.

IMAP vs Office 365: Why Migrate IMAP to Microsoft Office 365?

Many small organizations still use IMAP-based email accounts for daily communication. However, as they grow, they need to switch from web-hosted email server to Office 365 to get advantages of Microsoft email, security & productivity features. Office 365 is part of Microsoft 365. It widely used cloud platform that has multiple productivity applications together in single environment.

Nevertheless, moving emails from IMAP mailbox to Office 365 is not easy process. Users need to check emails, folders, attachments, and other mailbox data while continuing to access account without any disruption. Before jumping in, let’s explore primary reasons to know why users migrate from IMAP to Office 365.

  • Access emails from computers, smartphones, tablets, & web browsers.
  • Office 365 provide better security, access controls, & threat protection than IMAP.
  • Integrate with Outlook, Teams, OneDrive, & SharePoint application to get better productivity.
  • Manage mailboxes, users, & permissions from one platform.
  • In Office 365, you can add users & services as organization grows.
  • Microsoft provide cloud storage, retention, recovery, & backup options.
  • Microsoft effortlessly manage infrastructure, updates, & server maintenance automatically.

Prerequisites Before You Start!

Learn few things before beginning migration process. If users choose manual migration then you need to prepare more things than with automated solution. Let’s check out!

  • Before beginning migration, create extra copy of IMAP mailbox for safety.
  • Admin access of Microsoft 365 account.
  • IMAP account login credentials.
  • Active Microsoft 365 license.
  • Properly added & verified domain in Microsoft 365.
  • Enable IMAP access for source email account.
  • Enable two-factor authentication & create app-specific password for IMAP connection.
  • Know mailboxes & approximate mailbox size.
  • Choose any migration method & plan migration time that doesn’t disturb you.

How to Migrate IMAP to Office 365 Manually?

If you are preparing to import IMAP email to Office 365 from IMAP server (like Gmail, Yahoo, GoDaddy, and other custom email providers), there are couple of manual methods to consider. However, please note that these methods require technical steps. Free method prefer to migrate small to medium-sized migrations. Check or follow most common manual methods that you can use based on your level of access & comfort.

Method 1: Migrate IMAP to Office 365 by M365 Admin Center

  1. Create a CSV file containing your IMAP user emails, usernames, and passwords.
  2. Login to Microsoft 365 Admin Center.
  3. Select Setup > Data migration.
  4. Select your email provider (IMAP servers like Gmail, Yahoo, etc.).
  5. Upload the CSV file.
  6. Start your migration and wait for it to finish migrating IMAP to Office 365.

This way, you can move emails from your IMAP account to Office 365 using the Microsoft Admin Center.

Method 2: Transfer IMAP Emails to Office 365 by Outlook Drag & Drop Feature

  1. Add or connect IMAP account to Outlook.
  2. Allow Outlook to sync both mailboxes.
  3. After that, drag emails from IMAP mailbox to Office 365 mailbox.
  4. Wait for Outlook to upload the moved emails to Office 365.

Method 3: IMAP to Office 365 Migration Using PowerShell Method (For Admins)

  1. Create a CSV file of email addresses and credentials.
  2. Open Windows PowerShell and log into Exchange Online.
  3. Create the migration batch using:
    New-MigrationBatch -Name "IMAPtoO365" -CSVData ([System.IO.File]::ReadAllBytes("C:\IMAPList.csv")) -SourceEndpoint "IMAP" -TargetDeliveryDomain "domain.onmicrosoft.com"
  4. Start the migration using:
    Start-MigrationBatch -Identity "IMAPtoO365"
Note: These manual methods are not recommended by professionals to move data from IMAP account to Office 365 account, as they are too technical, time-consuming and can cause many technical errors. To use these methods, users require high level of technical expertise. However, an automated method is also mentioned that provide direct IMAP to Office 365 migration.

Method 4: Direct Solution to Migrate IMAP to Office 365 Account

Download RecoveryTools IMAP Backup Tool that provides simple migration from IMAP to Office 365. Users don’t need any additional email client to complete migration such as Outlook. It provide batch mode option to migrate bulk of IMAP mailboxes to Office 365 account without any data loss. Users also get multiple filter feature which make migration process more accurate. It help users to remove duplicate emails from IMAP before migration. Download free demo edition of this application to know more about the software.

Free Trial Limitation: – This toolkit comes with a free trial edition that allows the users to migrate only the first 25 emails from IMAP account to Office 365. For unlimited migration users need to first activate pro version of this application.

How to Migrate or Transfer IMAP Mailboxes to Office 365? (Step-by-Step Guide)

  1. Firstly, download & start software on your computer.
    install software
  2. Once started, enter login details such as Email Address & Password.
    login imap account
  3. Once logged in, preview loaded folders in software panel.
    preview folder
  4. Use filter Options to migrate specific emails.
    use filter feature
  5. Now, choose Office 365 option from saving list.
    choose office 365
  6. Enter your Office 365 mailbox user ID & password.
    login office 365 account
  7. Click Backup Button to begin migration process.
    start imap to office 365 migration

Prime Features of IMAP to Office 365 Migration Tool

  • User-friendly Interface: The tool is designed to provide an easy & simplified working interface. A user will not face any problems while trying to use this tool. It comes up with a very user-friendly interface that makes the whole migration process smooth.
  • Preserve Folder Hierarchy: This application is designed to provide maximum benefits to its users. It will preserve & maintain the original system folder hierarchy of mailboxes. The emails from any specific folder will migrate IMAP to Office 365 account.
  • Batch Migrate Multiple IMAP Accounts: A user can batch migrate emails from an IMAP account to Office 365 account. Users only need to enter the credentials of multiple IMAP accounts through a CSV file. A user can list the login credentials of all these email clients in the same file & then browse it to the server.
  • Maintain Email Integrity: Moreover, the IMAP to Microsoft 365 migration tool will keep IMAP email metadata & properties completely preserved. We will not make any changes to the original components of the emails like email headers, signatures, inserted attachment files, etc when you import IMAP email to Office 365.
  • Advanced Filters for Selective Migration: This toolkit will provide multiple filter settings to its users. By applying these settings, a user can selectively export only the desired items. The user can apply these filter settings based on To, From, Date Range, or Subject.
  • Run-on both Mac & Windows OS: A user can run the IMAP to Office 365 migration software easily on both Microsoft Windows & Mac OS devices. It is compatible with both OS without any platform dependency.

FAQs: IMAP to Office 365 Migration

1. Does Office 365 use IMAP or POP?

Office 365 supports IMAP / SMTP.

2. Can I Install this tool in Dutch Language?

Yes, the IMAP to Office 365 migration tool allows users to install the tool in different languages including English, Dutch, Spanish, French, Finnish, Norwegian, Spanish, etc.

3. What is the use of the “I Am Admin” option in this tool?

If any user has admin account credentials for Office 365, then they can enable this option and enter the login details to migrate IMAP to Office 365.

4. Is the “Use Batch Mode” option used to migrate emails from multiple IMAP accounts?

Yes, this option allows users to migrate emails from multiple IMAP accounts by simply uploading a CSV file that contains login details of all charges. And also, users can add their email address and password in the mentioned column.

Conclusion

This article gives a detailed process of how to migrate IMAP to Office 365 account using manual and direct methods. Moreover, there are multiple other solutions present on the Internet but this is one of the best and most effortless solutions present on the Internet. We recommend you all continue with this solution without the need for any kind of technical guidance.

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