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    • EDB Recovery and MigrationRecover EDB to PST, EDB to Office 365 and Exchange NO Duplicate Migration
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    • MBOX Export and MigrationExport MBOX to PST, MBOX to Office 365 and Exchange Migration
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    • EML to PST ExportEML files export to Outlook PST format
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    Exchange and Office 365 Migration
    • Exchange Server MigrationMigrate Exchange 2007, 2010, 2013, 2016, 2019 to Office 365 tenants. Also, migrate between Exchange servers and PST
    • Office 365 MigrationMigrate Source Office 365 tenants to Destination Office 365 tenants. Also, migrate to Exchange Server and PST
    • IMAP Email Backup & MigrationMigrate all IMAP email servers (Gmail, Zimbra, Zoho, Yahoo etc.), Office 365, Exchange and Backup to Outlook PST
    • SharePoint Online MigrationMigrate documents, files and folders from SharePoint sites
    • OneDrive for Business MigrationMigrate documents, files and folders from OneDrive
    • Microsoft Teams MigrationMigrate Teams, documents, files and folders etc.
    Exchange and Office 365 Backup
    • Office 365 BackupIncremental, Granular, Encrypted and Compressed Office 365 Mailboxes Backup
    • Exchange Server BackupIncremental, Granular, Encrypted and Compressed Exchange Mailboxes Backup
    • SharePoint, OneDrive & Teams BackupBackup Online site collections, Team sites, Office 365 groups, all documents etc.
    • Duplicate Remover - Office 365 & Exchange Remove duplicate emails, calendars, contacts, journal etc. from Office 365 and Exchange
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User’s Manual
IMAP Email Backup & Migration

User Manual

User Manual

  • Overview
  • System Requirements
  • Installation
    • Installation process
    • Reinstall or Upgrade
    • How to uninstall
  • Initial Setup
  • FAQ
    • IMAP Migration to Office 365
    • IMAP Migration to Exchange
    • Gmail Backup and Migration
  • Videos
    • IMAP to Office 365 Migration
    • IMAP to Exchange Migration
    • Gmail Backup and Migration
    • IMAP Migration to PST
    • Outlook PST to IMAP Migration
    • IMAP Migration to IMAP
  • Screenshots
    • IMAP Migration to Office 365
    • IMAP Migration to Exchange
    • Gmail Backup and Migration
    • IMAP Migration to PST
  • How it works?
    • IMAP Migration to Office 365
    • IMAP Migration to Exchange
    • Gmail Migration
    • IMAP Migration to PST
    • IMAP Migration to IMAP
    • Outlook PST to IMAP
    • cPanel to cPanel Migration
    • IMAP to Office 365 Shared mailbox migration
  • Connect to IMAP
    • Connect IMAP Single Server
    • Connect IMAP Multiple Server
  • Enable less secure apps in Gmail
  • Export Gmail contacts and calendars
    • Export Gmail contacts to Office 365
    • Export Gmail Calendars to Office 365
  • Connect to Office 365
    • Modern Authentication Using OAuth 2.0
      • Microsoft 365 modern authentication
      • Automatic Registration
      • Manual Registration
    • Connect with Global Admin
    • Connect to Office 365 with full access permission
    • Connect to Office 365 with CSV file option
    • Connect to Office 365 as single user mailbox
  • Connect to Exchange server for multiple mailboxes migration
    • Connect with Global Admin
    • Connect to Multiple user using CSV file
    • Connect using full access permission
    • Connect individual users for Single / Specific user Migration
  • Connect to Hosted Exchange for its Migration
    • Connect with Full Access permissions
    • Using multiple user credentials with CSV file
    • Connecting to Individual user for its migration
  • Knowledge Base
    • IceWarp to Office 365 migration
    • Zimbra to Office 365 migration
    • AOL Emails to Office 365 migration
    • Zoho Mail to Office 365 migration
    • GoDaddy to Microsoft 365 migration
    • ProtonMail to Office 365 migration
    • cPanel to Office 365 migration
    • Rackspace to Office 365 migration
    • Plesk to Office 365 migration
    • Barracuda to Office 365 migration
    • AWS Workmail to Office 365 migration
    • 123 Reg to Office 365 migration
    • Bluehost to Office 365 migration
    • Dovecot to Office 365 migration
    • hMailServer to Office 365 migration
    • BigRock to Office 365 migration
    • Liquid web to Office 365 migration
    • Dreamhost to Office 365 migration
    • Comcast to Office 365 migration
    • Google Vault to Office 365 migration
    • Enterprise Vault to Office 365 migration
    • Mimecast Archive to Office 365 migration
    • HostMonster to Office 365 migration
    • SiteGround to Office 365 migration
    • Fastmail to Office 365 migration
    • SmarterMail to Office 365 migration
    • MDaemon to Office 365 migration
    • Zimbra to Gmail migration
    • Rackspace to Gmail migration
    • Zoho to Gmail migration
    • Rackspace to AWS migration
    • iCloud Mail to Office 365 migration
    • Yandex Mail to Office 365 migration
    • GMX Mail to Office 365 migration
    • Gmail to Tutanota migration
    • Ionos to Office 365 migration
    • Hostgator email to Office 365 migration
    • Namecheap email to Office 365 migration
    • Posteo to Office 365 migration
    • Tiscali email to Office 365 migration
    • Tiscali email to Gmail migration
    • BT email to Office 365 migration
    • Open xchange email to Office 365 migration
    • Cox email to Office 365 migration
    • BigPond email to Office 365 migration
    • ATT email to Office 365 migration
    • Frontier email to Office 365 migration
    • Charter email to Office 365 migration
    • Horde email to Office 365 migration
    • T-online email to Office 365 migration
    • Virginmedia email to Gmail migration
    • Earthlink email to Gmail migration
  • Set Office 365 Impersonation rights
    • Using PowerShell commands
    • Using Office 365 GUI
  • Set Exchange Server Impersonation rights
    • Exchange 2007 and below
    • Exchange 2010, 2013, 2016 and 2019
    • Set using Exchange Server GUI
  • Incremental Migration
  • Exchange Throttling Policy
  • Map the Mailboxes
  • Multifactor Authentication
    • Enable MFA in Office 365
    • Create App password for MFA
    • Disable Security Defaults
  1. Home
  2. Product
  3. How to Migrate from ProtonMail to Office 365 (Microsoft 365)
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ProtonMail to Office 365 migration

As organizations evolve, the need for more flexible and collaborative platforms becomes critical. While ProtonMail excels in providing robust end-to-end encryption and privacy, many businesses find its lack of integration with tools like Microsoft Teams, SharePoint, and Public Folders a challenge. Office 365 offers seamless access to these productivity tools, making it the ideal choice for businesses aiming to balance security with enhanced collaboration.

However, migrating from ProtonMail to Office 365 does come with its challenges. Data mapping inconsistencies may arise, especially when attempting to align ProtonMail's encryption-based structures with Office 365's diverse data formats. Minimizing downtime is also crucial to prevent disruptions in daily business operations. Additionally, ensuring smooth synchronization of user accounts and settings across both platforms is essential for a successful transition. ProtonMail's IMAP limitations can also complicate the migration of certain items, such as calendars and contacts, which require more robust solutions.

IMAP migration to Office 365

EdbMails IMAP Migration Software effectively simplifies the complexities of email migration with powerful, user-centric features. It enables concurrent mailbox transfers, allowing organizations to migrate multiple accounts efficiently while keeping business operations running smoothly. Advanced filtering options let you precisely select emails, folders, or date ranges to migrate only the data you need. EdbMails also ensures complete metadata preservation—including message properties, timestamps, and folder hierarchy—maintaining the integrity and structure of your mailboxes. This all-in-one solution delivers a secure, efficient, and seamless transition from ProtonMail to Office 365 with minimal effort.

  1. Top reasons to migrate from ProtonMail to Office 365

    1. Increased productivity

      Office 365 integrates essential tools like Microsoft Teams, SharePoint, and OneDrive, enabling seamless collaboration across departments. While ProtonMail is primarily focused on privacy, Office 365 enhances productivity by offering features such as shared documents, real-time editing, and efficient team communication channels.

    2. Centralized management

      Office 365’s centralized administration offers comprehensive control over all accounts, security policies, and user management from a single dashboard. ProtonMail lacks these unified management capabilities, which is crucial for organizations managing multiple users and devices across different locations.

    3. Security

      Although ProtonMail offers end-to-end encryption, Office 365 provides enterprise-grade security features that go beyond basic encryption. With multi-factor authentication, advanced threat protection, and compliance with regulations like GDPR and HIPAA, Office 365 offers businesses comprehensive security measures without sacrificing usability.

    4. Cloud access

      Office 365 is fully cloud-based, providing instant access to email, files, and applications from any device or location. While ProtonMail is accessible via web and mobile, it does not offer the comprehensive cloud services that Office 365 users enjoy, such as integration with cloud storage and collaboration tools.

    5. Interactive calendar sharing

      Office 365’s calendar can be shared and synchronized across users, facilitating team scheduling and resource management. ProtonMail’s basic calendar features do not offer the same level of interactivity or collaboration.

    6. Strong search and archiving features

      Finding specific emails or archived data in Office 365 is highly efficient, thanks to its powerful search algorithms and customizable archiving. ProtonMail’s search and archiving functionalities are more limited, which can slow down workflow in larger organizations.

    7. Mail forwarding

      Office 365 supports mail forwarding, a basic feature that ProtonMail surprisingly lacks. For businesses requiring seamless forwarding between multiple accounts, this limitation is a major drawback of ProtonMail.

    8. Better spam filtration

      While ProtonMail filters spam effectively, Office 365’s advanced spam and phishing filters offer greater customization and accuracy, reducing the risk of cyber threats and ensuring a cleaner inbox for users.

  2. ProtonMail to Office 365 migration plan

    Planning is one of the most important steps before you begin the ProtonMail to Office 365 migration. Here is a checklist of points to consider before you migrate.

    • Determine the size of the data and the number of mailboxes you want to migrate.
    • Identify all data (emails, contacts, calendars) and permissions to migrate from ProtonMail.
    • Create required user mailboxes in Office 365 and assign the appropriate licenses to each account.
    • Ensure you have enough network capacity and bandwidth to migrate.
    • Communicate the migration plan and flow to your end users.
    • ProtonMail to Office 365 migration prerequisites

      1. Find the IMAP server name of your ProtonMail server. You can find this information from your server’s dashboard settings or by connecting your email system to Outlook.
      2. Have the users email address, passwords, IMAP hostname and port number.
      3. Create mailboxes on your target Office 365 server. You can choose the option to automatically create target mailboxes in EdbMails. If you prefer to create them manually, refer to the links below.

         Add users and assign licenses to Office 365 users

         Assign Microsoft 365 licenses to user accounts

      4. If you have a custom email domain from your hosting provider to which you want to migrate and receive emails, 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.

      5. Configure Office 365 to send and receive large messages.

         Follow the steps to increase the message size on Office 365 to 150MB and see tips to optimize IMAP migration to Exchange online.

    • Steps to migrate from ProtonMail to Office 365 using EdbMails

      • Step 1: Download and Install EdbMails software

        • Download EdbMails and install the application on any computer running on Windows OS.

          EdbMails software installation

        • Launch the application and 'Login' using your registered email address and password or 'Start Your Free Trial' if you have created an account yet.

          EdbMails software login

        • Select the option ‘IMAP (Gmail, Outlook & more) Migration’

          Select ‘IMAP to Migration’ option

        • Select ‘IMAP to Office 365 Migration’.

          Select ‘IMAP to Office 365 Migration’ option

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

          IMAP Job Name’ option

      • Step 2: Connect to source ProtonMail server

        • To migrate a single user, enter the ProtonMail IMAP Host Name, Port Number (993 for SSL), and the user’s login details and proceed.

          Connection method

        • Choose the correct IMAP host name from the list or manually enter it (e.g., mail.yourdomain.com). Then, fill your email address, password.
        • Click the ‘Login’ button.

          Connect to single user account

        • For migrating multiple Protonmail mailboxes, select ‘Multiple (Bulk) Users/Accounts Migration’ and click ‘Next’.

          Connect to multiple user

        • Click ‘Download Sample CSV File’.

          download sample csv file

        • Update the CSV file by entering the necessary details such as the email address, password, server hostname, and port number. Once updated, save the file and close it.

          modify csv file

        • Then, click on the 'Browse CSV File' button, find your updated CSV file, select it, and open it to continue.

          browse CSV file

          Note: If you're unable to log in using your current account password, download ProtonMail Bridge to generate an app-specific password. Use this app password to log in, as shown in the screenshot below.

          Launch ProtonMail Bridge

      • Step 3: Select ProtonMail mailboxes

        • Select the mailboxes or specific folders you want to migrate, then click ‘Next’.

          Click Add New Connection

      • Step 4: Connect to target Office 365 server

        • Click the ‘Add New Connection’ button to establish a new connection to the target Office 365. To use the previous connection, select it from the connection list and click the ‘Connect to Existing’ button to proceed.

          Click Add New Connection

        • Select the required connection options and click the ‘Next’ button.

          Select the required connection option

        • Select the authentication method and click the ‘Login’ button to continue.

          Connect to the target Office 365 server

        • Sign in through the official Microsoft login page to securely authenticate your account.

          Microsoft sign-in page

        • EdbMails allows you to load mailboxes automatically, which is quick and convenient. However, due to Microsoft API limitations, the automatic loading method can list up to 100 mailboxes at a time. For larger environments or to include specific mailboxes beyond this limit, you can use the CSV file method to load mailboxes manually—giving you full control over the selection process.
        • Click the ‘Next’ button to continue.

          Select the option to load the mailboxes

      • Step 5: ProtonMail to Office 365 mailboxes mapping

        • Choose one of the mapping options.

          Choose mailbox mapping option

        • You can choose to let EdbMails automatically create mailboxes in Office 365 and map them to the source servers. This feature is especially useful for large-scale migrations, saving time and reducing manual effort.

          IMAP server to Office 365 mailboxes mapping

      • Step 6: Start ProtonMail to Office 365 migration

        • After mapping the mailboxes, click the ‘Start Migration’ button to initiate the migration process.

          Start ProtonMail to Office 365 migration progress

        • Click the ‘View Log’ button to view the migration report, which includes mapping details and the total count of migrated emails.

          Start ProtonMail to Office 365 migration progress

        • Login to your target server and verify the items.
    • ProtonMail to Office 365 post-migration activities

      • Step 1: Update the MX records to point to Office 365

        To ensure seamless email delivery and proper functionality after migration, update the MX records to route messages to the target Office 365 server. Additionally, set up the Autodiscover record to enable Outlook to effortlessly connect with the migrated mailboxes.

      • Step 2: Create a new Outlook profile for users in the new domain

         Configure the Outlook profile for each user in your domain if Outlook has problems connecting to Office 365 mailboxes.

    • ProtonMail to Office 365 migration troubleshooting

       For troubleshooting, explore our Knowledge Base articles. For further queries, review the Frequently asked questions or connect with our support team for assistance.

    Advantages of EdbMails for ProtonMail to Office 365 migration

    1. Incremental (Delta) migration

      EdbMails offers delta migration, allowing you to migrate only the changes made after the last migration. This minimizes redundant transfers, saves time, and ensures that the migration process is both efficient and precise.

    2. Comprehensive migration reports

      EdbMails generates detailed migration reports that allow you to track the progress and status of your ProtonMail to Office 365 migration. This feature provides full transparency, ensuring you stay informed throughout the migration process.

    3. Intuitive and user-friendly interface

      EdbMails features a simple, easy-to-use Graphical User Interface (GUI) designed for both technical and non-technical users. It enables effortless navigation, making the migration process straightforward without the need for technical expertise.

    4. Effortless email transfer with attachments

      EdbMails facilitates the seamless transfer of all ProtonMail emails, including attachments, to Office 365 without storing any sensitive information. This ensures that your data remains secure while migrating.

    5. Preserves folder hierarchy

      EdbMails ensures that the internal folder structure of your ProtonMail account is preserved during migration to Office 365, maintaining the organization and accessibility of your email data in its original format.

    6. Accurate and fast migration

      With EdbMails, you can expect 100% accurate and fast migration of emails from ProtonMail to Office 365. The tool handles large volumes of emails swiftly, minimizing disruption to your workflow.

    7. Selective email migration

      EdbMails provides the option to migrate selective emails from ProtonMail to Office 365. This feature allows you to choose specific emails, offering greater control and flexibility during the migration process.

    8. Free demo version

      EdbMails offers a free demo version that lets you evaluate the software’s functionality before committing. This allows you to experience the efficiency and ease of the migration process first-hand.


    Additional resources:

    • Dovecot to Office 365 migration
    • hMailServer to Office 365 migration
    • BigRock to Office 365 migration
    • Liquid web to Office 365 migration
    • Dreamhost to Office 365 migration
    • Comcast to Office 365 migration
    • Google Vault to Office 365 migration
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     In this manual

    IntroductionReasons to MigrateMigration PlanMigration PrerequisitesMigartion StepsPost-Migration ActivitiesTroubleshootingAdvantages of EdbMails

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