Screenshots Stellar Converter for OST

Select Hosted Exchange and Enter login details

Select Hosted Exchange to export mailboxes from an online EDB file. Select Connect to Single Mailbox or Connect to Single Mailbox from Connection Options

Enter Admin Email and Server Name

Enter Admin and Server Name (for Exchange 5.5, 2000, 2003, 2007) or tick "Exchange Server 2010 and higher" checkbox to enter Admin Email, Server Name and Password (for MS Exchange 2010, 2013, 2016, and 2019). Click OK.

Check Connected/Disconnected Mailbox Status

After establishing the connection with Exchange Server, Next window displays list of connected and disconnected mailboxes. Click "OK" to proceed.

Check the Preview of all Mailboxes

Check the preview of all mailbox items- Emails, Calendars, Contacts etc.

Select “Save as PST”

Click Save from Home Ribbon and Select Save as PST option. Click "Next" to proceed.

Download the Software

Welcome! If you're here, you've likely registered through the Stellar Migrator for Exchange website and received an email containing your login credentials. This email includes a download link for the Stellar Migrator for Exchange software (EXE) and access details for the Licensing Portal (stellarlicenseserver.com). To get started, click on the download link provided in the email or access it directly from the Licensing Portal.

Install the software

After downloading the Stellar Migrator for Exchange setup file, run the installer and follow the on-screen instructions to complete the installation. Once installed, launch the software — no additional configuration is required. You're now ready to start your test migration using the 2 free mailbox credits included. The next step is to create your first migration job.

Login to Licensing Server

When prompted, the 'Login to Licensing Server' window will appear. The Licensing Server URL (https://api.stellarlicenseserver.com) is pre-filled. Enter your User ID and Password. The screen displays License Available count and a green 'Status: Connected' indicator once successfully authenticated. Click OK to proceed with the licensed migration.

Migration Type

When you launch the software and create a new job, the Migration Type screen appears first. Under 'Choose a source server type you want to migrate from', select Exchange Server and enter the source Domain Name. Under 'Choose a target server type you want to migrate to', select Exchange Server and enter the target Domain Name. This configures the job as an Exchange to Exchange (server-to-server) migration. Click Next to proceed.

General – Create Migration Job

Provide a name for your migration job (for example, 'Exc to Exc') — this name will be displayed on the list of jobs. Then select the mailbox type(s) you want to migrate: primary/shared mailboxes, archive mailboxes, or public folders. You can also import a pre-mapped CSV file directly from this screen.

Connect Source

Connect the software to the source Exchange Server. Enable 'Use Autodiscover Email' and enter the Email address and Password — the software will automatically locate and connect to the source server. Alternatively, uncheck Autodiscover and manually enter the IP address/FQDN, Email address, and Password. You can also click 'Click here' to reuse the previously used Source ID. Click Validate to confirm the connection before proceeding.
Note: Impersonate Rights are mandatory for the email address used to connect to the Exchange Server.

Source Mailboxes

The next screen displays the list of mailboxes found in the source Exchange Server. Review the list to confirm all required source mailboxes are present. If you have more than 99 mailboxes, use the 'Load Mailboxes Using CSV' option and upload a CSV file containing all mailbox addresses.

Connect Target

Connect the software to the target Exchange Server. Enable 'Use Autodiscover Email' and enter the Email address and Password — the software will automatically locate and connect to the target server. Alternatively, uncheck Autodiscover and manually enter the IP address/FQDN, Email address, and Password. You can click 'Click here' to reuse the previously used Target ID. Click Validate to confirm the connection before proceeding.
Note: Impersonate Rights are mandatory for the email address used to connect to the Exchange Server.

Target Mailboxes

The next screen displays the list of mailboxes found in the target Exchange Server. Review the list to ensure all destination mailboxes are available for mapping. If you have more than 100 mailboxes, use the 'Load Mailboxes Using CSV' option to load the complete list.

Map Mailboxes

The software automatically maps source and target mailboxes by comparing their email addresses. Mailboxes that are successfully matched appear in green; unmatched mailboxes are marked 'Not Mapped' in red. Use the Edit (…) button to manually map any unmatched mailboxes. The status bar at the bottom shows Total mailboxes, Mapped count, and Not mapped count.

Scheduler

Configure when the migration job should run. Choose 'Run manually' to start migration on demand, or select 'Schedule job' and click the Scheduler button to set the frequency (Run once, Daily, Weekly, or Monthly), start and end times, and duration. The description field at the bottom previews the configured schedule. Use the Scheduler dialog to set the exact frequency, occurrence times, start date, and optional end date for the migration run.

Date Filter

Apply a date filter to control which mail items are migrated (applies to mail items only). Options include: Migrate all items, Migrate items older than a specific date, Migrate items not older than a specific date, or Migrate only items from a specific date range. This helps reduce migration scope when needed.

Folder Type Filter

Select the folder types to include in the migration. Available folder types are: Emails, Contacts, Calendars, Tasks, Notes, and Journals. Special folders include Junk Email, Deleted Items, and Drafts. All are selected by default. Uncheck any folders you want to exclude to ensure only the required data is migrated.

Max Concurrency

Configure migration speed and resilience. Set the number of Concurrent mailbox migration threads (5 recommended), Concurrent item migration threads per mailbox (5 recommended), and the number of retry attempts in case of network failure (default: 2). Migration speed depends on system configuration, network speed, and source and destination server performance.

Summary

Review the complete job summary before starting migration. The summary displays: Job name, Mailbox types, Source server (Exchange Server), Target server (Exchange Server), Total mailboxes, Mapped counts for primary/archive mailboxes and public folders, Scheduler setting, Date filter, Folder type filter, and Concurrent mailboxes. If any setting needs correction, click the relevant section in the left panel to go back and edit it. Click Finish to create the migration job.

Initiate Migration

After clicking Finish to create the job, click Start in the JOB ribbon at the top to begin the migration process. The migration dashboard shows real-time Job Progress with columns for Action, Source mailbox, Target mailbox, Migration progress (%), Total items, Migrated, Filtered, Failed, and Start date. The Mailbox Progress panel at the bottom shows folder-level detail. You can Pause or Stop the migration at any time using the buttons in the JOB ribbon.

Migration Completed

After completing the migration, the action field in the job progress section will change from Migrate to Don't Migrate. If the job fails to migrate, it will remain in the Migrate state, allowing you to attempt the migration again without making repeated changes.

Download the Software

Welcome! If you're here, you've likely registered through the Stellar Migrator for Exchange website and received an email containing your login credentials. This email includes a download link for the Stellar Migrator for Exchange software (EXE) and access details for the Licensing Portal (stellarlicenseserver.com). To get started, click on the download link provided in the email or access it directly from the Licensing Portal.

Install the Software

After downloading the Stellar Migrator for Exchange setup file, run the installer and follow the on-screen instructions to complete the installation. Once installed, launch the software — no additional configuration is required. You're now ready to start your test migration using the 2 free mailbox credits included. The next step is to create your first migration job.

Login to Licensing Server

When prompted, the 'Login to Licensing Server' window will appear. The Licensing Server URL (https://api.stellarlicenseserver.com) is pre-filled by default. Enter your User ID and Password to authenticate.
The screen displays the License Available count and a green 'Status: Connected' indicator once successfully authenticated. Click OK to proceed and consume licenses for the migration.

Migration Type

When you launch the software and create a new job, the Migration Type screen appears first. Under 'Choose a source server type you want to migrate from', select Microsoft 365. Under 'Choose a target server type you want to migrate to', also select Microsoft 365. This configures the job as an Office 365 to Office 365 (tenant-to-tenant) migration. Click Next to proceed.

General – Create Migration Job

Configuring General Settings is the first step in creating a migration job. Start by providing a name for your migration job, such as “365 to 365,” which will appear in the list of migration jobs for easy identification. Next, select the mailbox type(s) you want to migrate, including primary/shared mailboxes, archive mailboxes, and public folders. If you already have a CSV file containing mapped source and target mailboxes, you can enable the option “Migrate using CSV containing the list of already mapped source and target mailboxes” and click Import to upload the file, which allows you to skip the automatic mapping process.

Connect Source – Auto Registration

The Connect Source screen provides two registration methods for the source Microsoft 365 tenant: Auto Registration and Manual Registration. With Auto Registration, click “Log in as Microsoft 365 Global admin” to sign in through the Microsoft 365 login window, after which a green checkmark confirms the connection. For Manual Registration, register an application in Azure AD and enter the Email Address, Application (client) ID, Directory (tenant) ID, and Client Secret Value.

Source Mailboxes

The next screen displays the list of mailboxes found in the source Microsoft 365 tenant. The total number of primary mailboxes detected is shown above the list. Review the list to confirm all required source mailboxes are present. If you have more than the displayed mailbox limit, use the 'Load Mailboxes Using CSV' button and upload a CSV file containing all mailbox addresses to load the complete list.

Connect Target – Auto Registration

Connect the software to the target Microsoft 365 tenant using the same ADAL and OAuth 2.0 based modern authentication process. With Auto Registration selected, click “Log in as Microsoft 365 Global admin” and sign in using the target tenant’s Global Admin credentials. The Auto App Registration – Target dialog displays the verification steps, and once all steps are completed successfully with green checkmarks, click OK. Alternatively, use Manual Registration by entering the Email Address, Application (client) ID, Directory (tenant) ID, and Client Secret Value for the target tenant’s Azure AD application.

Target Mailboxes

After successfully connecting to the target Microsoft 365 tenant, the next screen shows the list of mailboxes found in the destination tenant. Review the list to ensure all required target mailboxes are available for mapping. If you cannot see all your target mailboxes, use the 'Load Mailboxes Using CSV' option to load the complete list from a CSV file.

Map Mailboxes

The software automatically maps source and target mailboxes by comparing their email addresses. Mailboxes that are successfully matched display the target address in green; unmatched mailboxes are marked 'Not Mapped' in red. Use the Edit (…) button on any row to manually assign a target mailbox to an unmatched source mailbox. The status bar at the bottom shows the total count of mailboxes along with how many are Mapped and Not mapped.

Scheduler

The Scheduler step lets you configure when the migration job should run. Two options are available:

• Run manually – Start the migration on demand by clicking Start in the JOB ribbon.
• Schedule job – Click the Scheduler button to set the frequency (Run once, Daily, Weekly, or Monthly), the occurrence start and end times, and the start date. The Description field at the bottom previews the configured schedule in plain language.

Date Filter

Apply a date filter to control which mail items are included in the migration (applies to mail items only). Choose one of the following options:

• Migrate all items – No date restriction; all mail items are migrated.
• Migrate items older than – Only items before the selected date are migrated.
• Migrate items not older than – Only items from the selected date onwards are migrated.
• Migrate only items from – Migrate items within a specific date range (from date to date).

Folder Type Filter

Select the folder types to include in the migration. By default, all folder types are selected, including Emails, Contacts, Calendars, Tasks, Notes, Journals, Junk Email, Deleted Items, and Drafts. You can uncheck any folders you want to exclude so that only the required data is migrated.

Max Concurrency

Configure migration performance and resilience settings. Adjust the following parameters based on your system and network capacity:

• Concurrent mailbox migration threads – Number of mailboxes migrated simultaneously (5 recommended).
• Concurrent item migration threads per mailbox – Number of items migrated in parallel per mailbox (5 recommended).
• In case of network failure, rerun job – Number of automatic retry attempts if the migration is interrupted (default: 2).
Note: Migration speed depends on system configuration, network speed, and the performance of both the source and target Microsoft 365 tenants.

Summary

Review the complete job summary before starting the migration and verify that all settings are correct before clicking Finish. The summary includes details such as the job name, selected mailbox types, source and target Microsoft 365 tenants, total mailboxes, mapped counts for primary/archive mailboxes and public folders, scheduler settings, date and folder type filters, and the number of concurrent mailboxes. If any setting needs to be changed, use the relevant section in the left navigation panel to go back and edit it. Once everything is verified, click Finish to create the migration job.

Initiate Migration

After clicking Finish to create the job, click Start in the JOB ribbon at the top of the main window to begin the migration process. The migration dashboard displays real-time job progress, including the current action, source and target mailbox details, migration status percentage, total items, migrated, filtered, and failed items, along with the start and end dates. The Mailbox Progress panel at the bottom provides folder-level migration details, and you can pause or stop the migration at any time using the corresponding buttons in the JOB ribbon.

Migration Completed

After the migration completes successfully, the Action field in the Job Progress section changes from 'Migrate' to 'Don't Migrate' for each completed mailbox, indicating that those mailboxes have been fully migrated. If a mailbox fails to migrate, it remains in the 'Migrate' state, allowing you to retry the migration for that mailbox without reconfiguring the entire job or making repeated changes to other mailboxes.

Sélectionnez Hosted Exchange et entrez vos données de connexion.

Sélectionnez Hosted Exchange pour exporter des boîtes aux lettres à partir d'un fichier EDB en ligne. Sélectionnez Connecter à une seule boîte aux lettres ou Connecter à une seule boîte aux lettres dans les options de connexion.

Saisissez l'adresse électronique de l'administrateur et le nom du serveur

Saisissez le courriel de l'administrateur et le nom du serveur (pour Exchange 5.5, 2000, 2003, 2007) ou cochez la case "Exchange Server 2010 and higher" pour saisir le courriel de l'administrateur, le nom du serveur et le mot de passe (pour MS Exchange 2010, 2013, 2016 et 2019). Cliquez sur OK.

Vérifier l'état de la boîte aux lettres connectée/déconnectée

Une fois la connexion à Exchange Server établie, une liste des boîtes aux lettres connectées et déconnectées s'affiche dans la fenêtre suivante. Cliquez sur "OK" pour continuer.

Vérifier l'aperçu de toutes les boîtes aux lettres

Vérifiez l'aperçu de toutes les boîtes aux lettres - courriels, calendrier, contacts, etc.

Sélectionnez "Enregistrer sous PST".

Cliquez sur Enregistrer dans le ruban Démarrer et sélectionnez l'option Enregistrer sous PST. Cliquez sur "Suivant" pour continuer.

Selezioni Hosted Exchange e inserisca i suoi dati di accesso.

Selezioni Hosted Exchange per esportare le caselle postali da un file EDB online. Selezioni Connetti a una singola casella postale o Connetti a una singola casella postale dalle opzioni di connessione.

Inserisca l'e-mail dell'amministratore e il nome del server

Inserisca il nome dell'amministratore e del server (per Exchange 5.5, 2000, 2003, 2007) o selezioni la casella di controllo "Exchange Server 2010 e superiore" per inserire l'e-mail dell'amministratore, il nome del server e la password (per MS Exchange 2010, 2013, 2016 e 2019). Clicchi su OK.

Controlli lo stato della mailbox collegata/disconnessa.

Una volta stabilita la connessione a Exchange Server, nella finestra successiva viene visualizzato un elenco di caselle postali collegate e scollegate. Clicchi su "OK" per continuare.

Controlli l'anteprima di tutte le cassette postali

Controlli l'anteprima di tutte le caselle di posta elettronica - e-mail, calendario, contatti, ecc.

Selezionare "Salva come PST".

Clicchi su Salva nella barra multifunzione Avvio e selezioni l'opzione Salva come PST. Clicchi su "Avanti" per continuare.

Seleccione Hosted Exchange e introduzca sus datos de acceso.

Seleccione Hosted Exchange para exportar buzones desde un archivo EDB en línea. Seleccione Conectarse a un único buzón o Conectarse a un único buzón en las opciones de conexión.

Introduzca el correo electrónico del administrador y el nombre del servidor

Introduzca el correo electrónico del administrador y el nombre del servidor (para Exchange 5.5, 2000, 2003, 2007) o marque la casilla "Exchange Server 2010 y superior" para introducir el correo electrónico del administrador, el nombre del servidor y la contraseña (para MS Exchange 2010, 2013, 2016 y 2019). Haga clic en Aceptar.

Comprobar el estado del buzón conectado/desconectado

Una vez establecida la conexión con Exchange Server, en la siguiente ventana aparecerá una lista de los buzones conectados y desconectados. Haga clic en "Aceptar" para continuar.

Comprobar la vista previa de todos los buzones

Compruebe la vista previa de todos los buzones: correos electrónicos, calendario, contactos, etc.

Seleccione "Guardar como PST".

Haga clic en Guardar en la cinta Inicio y seleccione la opción Guardar como PST. Haga clic en "Siguiente" para continuar.

Wählen Sie Hosted Exchange und geben Sie Ihre Anmeldedaten ein.

Wählen Sie Hosted Exchange, um Postfächer aus einer Online-EDB-Datei zu exportieren. Wählen Sie Verbinden mit einem einzelnen Postfach oder Verbinden mit einem einzelnen Postfach aus den Verbindungsoptionen

Admin-E-Mail und Servernamen eingeben

Geben Sie admin und den Servernamen ein (für Exchange 5.5, 2000, 2003, 2007) oder aktivieren Sie das Kontrollkästchen "Exchange Server 2010 und höher", um admin E-Mail, Servernamen und Passwort einzugeben (für MS Exchange 2010, 2013, 2016 und 2019). Klicken Sie auf OK.

Prüfen Sie den Status der verbundenen/getrennten Mailbox

Sobald die Verbindung zu Exchange Server hergestellt ist, wird im nächsten Fenster eine Liste der verbundenen und nicht verbundenen Postfächer angezeigt. Klicken Sie auf "OK", um fortzufahren.

Prüfen Sie die Vorschau aller Postfächer

Prüfen Sie die Vorschau aller Postfächer - E-Mails, Kalender, Kontakte, etc.

Wählen Sie "Als PST speichern".

Klicken Sie im Menüband Start auf Speichern und wählen Sie die Option Als PST speichern. Klicken Sie auf "Weiter", um fortzufahren.