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In response to numerous user inquiries regarding the transition from to Microsoft 365 on our technical forum, we have taken the initiative to deliver comprehensive insights on this topic through our blog. This migration process is currently in high demand, and in this post, we offer a thorough explanation of the native migration method, along with a strong endorsement for the sophisticated and professional solution known as Kernel IMAP to Office 365., a Microsoft web-based email client, provides users with a comprehensive suite of services, including Mail, People (Contacts), To do (Tasks), and Calendar features. It seamlessly integrates with Skype for effective communication and also offers Office for the web integration, allowing users to effortlessly open, view, and edit attached documents such as Word, Excel, and PowerPoint files, enhancing productivity and collaboration.

The Microsoft 365/Office 365 platform encompasses Exchange Online, a robust service that securely stores a wealth of essential information, including emails, contacts, calendars, and more, within user mailboxes. Moreover, it seamlessly integrates a suite of collaborative and sharing tools such as SharePoint, Yammer, OneDrive, and others. With its extensive array of advanced security features, Microsoft 365 stands as a comprehensive solution, making it no surprise that the migration from to Microsoft 365 is currently gaining significant traction.

Migration of to Microsoft 365 via Microsoft 365 Admin Center

This manual procedure includes the use of Microsoft 365 Admin Center and its features to migrate data to Microsoft 365 using IMAP Server migration.

Note: Users can perform IMAP to Office 365 migration using Powershell commands also though this method is more technical and complex to execute.

Points to Consider Before Migration

Have a look at the prerequisites of the to Microsoft 365 migration.

  • Adding users in Microsoft 365 and assigning licenses to them
  • Collecting admin account credentials, username, and passwords of each user mailboxes in the source account
  • Source account preparing and collecting data for migration
  • Create an app password for your account to use this as the password for migration. Visit this link for reference.
Process of to Microsoft 365 Migration

Once all the above prerequisites for the migration are met, users can perform the migration with the following steps.

  1. Log in to your destination Office 365 account with administrator credentials and click on the Admin option.Log in to your destination Office 365 account
  2. On the left panel, search for the Setup section to expand it and click the Data migration option under it or follow Setup> for the Setup section
  3. Select the migration category as Emails to move emails from your IMAP server account to the Microsoft 365 destination.Select the migration category
  4. Click Get Started on the next page to proceed.Click Get Started
  5. Click Import my email messages on the Email sources page.Click on Import my email messages
  6. Select the data service Hotmail/ the data service Hotmail/
  7. Choose the email provider if it is listed and select the mailboxes for migration on the next page.
    If the email provider is not listed, click on the Other email sources on the Other email sourcesThen on the Select your data service page, provide the information details like – IMAP server name, port number, user name, password, security, etc., and click the Save option.provide the IMAP information detailsNext, select the user mailboxes you want to migrate, provide the email address and app password created for your account earlier. Then, click on the Start Migration option.Start Migration
  8. The migration process will initiate, providing a range of statuses, such as “Starting,” “Syncing,” and occasionally “Queued” when the migration is in a waiting state. Once the status changes to “Synced,” it indicates that both the migration and synchronization processes have concluded. To exit the migration, simply click on “Close Connection.”
Limitations of the Manual Method

The manual migration of to Microsoft 365 has certain drawbacks that users should know beforehand.

  • A technical and long process
  • Migrates only emails and not calendars, contacts, tasks, etc.
  • Maximum allowed email size for migration is 35MB
  • Maximum 500, 000 items are allowed to migrate from a user mailbox
A Quick Way to Migrate to Microsoft 365

For a seamless migration of your IMAP-based email clients, such as, with no constraints, it is recommended to employ a sophisticated, user-friendly, and resilient IMAP migration solution like the Kernel IMAP to Office 365 tool. This software offers an array of exceptional features and functionalities, setting it apart from other tools available in the market.

  • Supports almost all IMAP email servers for migration to the cloud
  • Provides server name and ports information on the interface itself
  • Migrate single as well as multiple IMAP email server mailboxes to Microsoft 365 mailboxes
  • Perform a quick, direct, and flexible migration with advanced filter options
  • Facilitates free trial version of the tool available to download
  • Facility to assign impersonation rights to Microsoft 365 user mailboxes directly
  • Easy mapping between source and destination mailboxes
  • Migrate IMAP mailboxes data to Archive, Shared, Public Folder, and Groups individually
  • Saves migration records into the CSV file format

FAQs for to Microsoft 365 Migration

Q- What size limitations are there in the manual IMAP migration through Microsoft 365 Admin Center?

A- In the manual migration of an IMAP email server to the cloud, you can migrate emails up to a maximum size of 35 MB and a total of 500,000 items only from the source mailbox.

Q- Does Kernel IMAP to Office 35 tool supports direct Gmail migration to the cloud?

A- Yes, the professional Kernel IMAP to Office 365 tool supports all IMAP-enabled email servers, including Gmail.

Q- Do I need to sign in to my account to migrate to Microsoft 365 in the automated migration via Kernel IMAP to Office 365 tool?

A- No, there is no such requirement. However, you need to provide the server name and login details of your source IMAP email server account to the tool for the migration.

Q- How feasible is the manual way of IMAP migration via Microsoft 365 Admin Center?

A- The manual way of IMAP migration via Microsoft 365 Admin Center is a feasible process only when all prerequisites are met and the process is done under the supervision of an expert. It has high chances of manual errors and data loss.

Q- Can I migrate data directly to Microsoft 365 public folder using the IMAP migration through Microsoft 365?

A- This is not possible through the manual solution, but the Kernel IMAP to Office 365 tool has the option of direct migration of specific IMAP email server data to the Microsoft 365 public folder.

Kernel IMAP to Office 365