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    • Exchange Server MigrationMigrate Exchange 2007, 2010, 2013, 2016, 2019 to Office 365 tenants. Also, migrate between Exchange servers and PST
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    • Office 365 BackupIncremental, Granular, Encrypted and Compressed Office 365 Mailboxes Backup
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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
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    • 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
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  3. T-online Email to Office 365 Migration | EdbMails
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T-online email to Office 365 migration

T-online is a popular German email service known for its simplicity and strong data security, offering a range of plans such as Freemail, Mail S, and Mail M to cater to various user needs. While it provides reliable communication and complies with German data protection laws, many T-online users are migrating to Office 365 for its advanced functionality, increased storage, and superior security features. Although T-online is secure, offering basic encryption, its storage limits of 1 GB for Freemail and 15 GB for Mail M fall short. In comparison, Office 365 offers 50 GB of mailbox storage, expandable to 100 GB, making it an appealing option for those needing more space.

Another reason for migration is the lack of advanced security features in T-online. While T-online offers basic encryption, it lacks the enhanced protection that Office 365 provides, such as Data Loss Prevention (DLP), Multi-Factor Authentication (MFA), and threat analysis to safeguard against cyber threats. Additionally, Office 365 offers integrated tools like Word, Excel, and Teams, which extend beyond email and contribute to enhanced productivity.

Many users searching for a way to move from T-online to Office 365 face the challenge that no manual migration method exists. However, EdbMails IMAP migration software offers a systematic and reliable automated solution for seamless migration from T-online to Office 365.

EdbMails simplifies the migration process with several advanced features. Its incremental migration ensures only new or modified emails are transferred, avoiding duplication and saving time. The granular (brick-level) migration feature allows users to select specific folders, mail items, or even individual emails for migration, giving them full control over the process. The automatic mailbox mapping feature ensures that source and destination mailboxes are mapped without the need for manual configuration, reducing errors. EdbMails also provides lifetime licenses with free software updates, guaranteeing access to the latest features at no extra cost, making it an efficient, cost-effective solution for migrating T-online emails to Office 365.

T-online email to Office 365 migration

User Query

"Our business has been relying on T-online for email, but we now need more storage, stronger security, and seamless integration with other productivity tools. We’re considering moving to Office 365. Could you offer a straightforward, trustworthy, and secure solution for migrating our T-online emails to Office 365?" - Jhon, Melbourne.

  1. T-online email to Office 365 migration plan

    Proper planning is crucial before you begin T-online email to Office 365 migration. Below is a checklist to ensure a smooth and secure migration process.

    • Determine the size of the data and the number of mailboxes you want to migrate.
    • Make a list of all the data and permissions from T-online email that you want to transfer.
    • Create appropriate user mailboxes on Office 365 and assign licenses to them.
    • Ensure you have enough network capacity and bandwidth to migrate.
    • Communicate the migration plan and flow to your end users.
  2. Pre-migration steps for T-online email to Office 365

    1. Find the IMAP server name of your T-online email 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.
      1. Add users and assign licenses to Office 365 user
      2. 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.

  3. Steps to migrate emails from T-online to Office 365 using EdbMails

    • Step 1: Download and install EdbMails IMAP migration software

      • Download EdbMailsand install the application on any computer running on Windows OS that is connected to the source and target environment.
      • Launch the application and click 'Login' button or 'Start Your Free Trial'

          See a detailed list of EdbMails system requirements for IMAP migration.

        Login to EdbMails application

      • Choose the 'IMAP Migration' method.

        Select ‘IMAP Migration’ option

    • Step 2: Connect to source T-online email server

      • If you want to migrate a single user, enter the Host Name, Port Number (993 for SSL), and account details to connect to the T-online email server as shown.

        Connect to single user account

      • If you want to migrate multiple mailboxes, select 'Multiple (bulk) Users/Accounts Migration'. Download the sample CSV file and add the required details such as mailbox name, password, hostname, and port. Load the CSV file into EdbMails and verify the list of mailboxes to continue.

        Connect to multiple users account

          Steps to connect to single and multiple users in EdbMails IMAP migration

    • Step 3: Select source T-online server mailboxes

      • Select the mailboxes and folders from the left panel to migrate to Office 365
      • Click 'IMAP to Office 365' to set up the connection with the target server

          See tips to optimize IMAP migration to Exchange online

        Select source T-online email server mailboxes

    • Step 4: Connect to target Office 365 server

      • Select the preferred method for secure OAuth-based modern authentication. The default option, ‘Auto Registration,’ requires Global admin access. Alternatively, in the Manual Registration method, you can use either a Global admin account or any user account with full access rights.

        Connect to target Office 365 server

      • Next, select the most suitable migration option and proceed to authenticate by logging into the Microsoft sign-in page.

        Select migration operation

      • Once logged in, choose the option to load T-online mailboxes. EdbMails also provides theoption to load mailboxes using a CSV file.

        Choose load mailboxes option

    • Step 5: T-online email to Microsoft 365 mailboxes mapping

      • Select the mapping option that best aligns with your requirements.

        Select mailbox mapping option

      • EdbMails handles migration by automatically creating mailboxes in Office 365, setting up target mailboxes, and mapping mailboxes and folders from the source T-online server to the target Office 365.

        T-online email to Office 365 mailboxes mapping

      • Click the ‘Folder and Item Filter’ option to customize your migration criteria. You can apply a date filter to transfer data within a specific range or exclude particular standard and custom folders from the migration process.

        Include exclude server mailboxes

    • Step 6: Start T-online email to Office 365 migration

      • After mapping the mailboxes, assign a job name and initiate the migration. To review the progress, click the ‘View Log’ button for a detailed migration report, showcasing the number of emails, folders, and other items successfully transferred.

        Start T-online email to Office 365 migration progress

  4. T-online email to Microsoft 365 post-migration tasks

    • Step 1: Modify MX records to direct email to Office 365

      Update MX records for directing email to the new server. Additionally, configure the Autodiscover record to ensure that migrated mailboxes connect smoothly with email clients like Outlook.

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

      If users encounter issues connecting Outlook to Office 365 mailboxes, manually configure their Outlook profiles in the new domain.

  5. T-online email to Office 365 migration troubleshooting

      For troubleshooting, check out our knowledge base articles. If you have additional questions, browse the FAQs or engage with our customer care team for personalized assistance.

Benefits of EdbMails for T-online email to Office 365 migration

  1. Concurrent migration for efficient email transfer

    EdbMails supports concurrent migration, enabling the simultaneous transfer of multiple mailboxes from T-online to Office 365. This speeds up the migration process and reduces downtime, making it ideal for businesses that need to migrate large volumes of data without interrupting operations.

  2. Script-free migration for hassle-free setup

    EdbMails ensures a script-free migration, eliminating the need for complex manual configurations. The user-friendly interface simplifies the entire migration process. Users can start the migration without any technical expertise, making it accessible for businesses of all sizes.

  3. Migrate without data loss for complete assurance

    With EdbMails, migrating from T-online to Office 365 is secure and reliable. The tool ensures no data loss during the migration process. Every email, folder, and attachment is transferred accurately, ensuring that nothing is overlooked or compromised during the move.

  4. Free trial to test all features

    EdbMails offers a free trial version that lets users test all features before committing to the full migration. This allows businesses to experience the tool’s functionality firsthand and ensure it meets their specific requirements before moving forward with the full migration.

  5. Maintaining data integrity during the migration

    EdbMails prioritizes maintaining data integrity throughout the entire migration process. The tool ensures that email structure, folders, and attachments are preserved exactly as they were in T-online. This attention to detail ensures a seamless transition without disrupting the organization’s workflow.


Additional resources:

  • Comcast to Office 365
  • Google Vault to Office 365
  • Enterprise Vault to Office 365 migration
  • Plesk to Office 365 migration
  • Barracuda to Office 365 migration
  • AWS Workmail to Office 365 migration
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