Complete Step-by-Step Guide for Aryson PST Viewer

View and manage Outlook PST data with the Aryson PST Viewer, which lets you access emails, attachments, contacts, calendars, notes, and tasks without requiring Outlook. Save PST data to multiple formats, including PDF, MBOX, MSG, EML, CSV, and PST, or migrate mailbox data to Office 365 using secure authentication methods such as Modern Authentication and Client ID & Secret.

Table of Content

Software Working Process
Activation Guide
Installation & Uninstallation
User Interface

Software Working Process

Step 1: Download and install the Aryson PST Viewer Tool on your device.

Step 2: Add PST/OST files to the software using the available options

Drag and Drop: Easily drag and drop PST/OST files into the software to load them for viewing.
Load Outlook Files: Detects the Outlook profile configured on your system and loads the associated PST/OST files for viewing.
Choose Manually: Select the required Outlook PST/OST files from your system.
Remove File: Click this button to remove all the loaded PST files.

Step 3: Preview & Search PST/OST Mailbox Data

Browse the mailbox folder to view emails and other available mailbox items.
Click Select All to select all folders at once, and Deselect All to remove all selected folders.
Expand All folders and subfolders simultaneously to view the complete PST folder structure quickly. Minimize All collapses all expanded folders and subfolders at once to simplify the PST folder view.
Use the Search Emails option to find specific emails within the PST/OST file quickly.
Click a folder to load its contents into the J-table.
Use Smart Search with fields such as To, From, Emails with Attachments, Date Range, or Subject to find specific emails.

Email Details:

This displays multiple To and From fields, CC, BCC, and Subject fields of the selected email, along with the following data components:

Body: View the complete email body/content, including the message text, formatting, and other embedded information.
Attachments: Lists, previews, and options to download the files associated with the selected email.
Calendar: Displays calendar item properties, including subject, date, time, and location.
Contacts: Displays contact records and associated information stored in the PST/OST file.
Notes: Displays notes stored within the PST/OST mailbox.
Tasks: Displays task properties and related information.
Headers: Displays technical message headers.
MIME: Displays the MIME structure and associated message components.
Raw HTML: Displays the source HTML code of the email for examining its underlying formatting structure.

Step 4: Click the Migrate to Office 365 button and authenticate the account using either Modern Auth (Single User or Admin) or Client Secret.

Modern Auth (Single User)

Enter the Office 365 single user account ID and click Remember this account to log in to a previously saved account directly.

Choose the account that you entered in the software to continue.

After successful authentication, a message is displayed showing that authentication is complete.

Modern Auth (Admin)

Enter the source Office 365 admin account and click Authenticate. Click 'Remember this account' to log in to a previously saved account directly.

Provide your password and click Sign in.
Approve Multi-Factor Authentication (MFA)
- If prompted, open the Microsoft Authenticator app on your mobile device.
- Approve the sign-in request.
- If a matching number is displayed (e.g., 45 ), enter that number in the Authenticator app and approve the request.
- Grant all the permissions that are requested.
- After successfully authenticating, a message is displayed.

Note: When selecting the Office 365 account in the browser, make sure you are already logged in to the required account.

Note: Sign in to the required Microsoft 365 account in your browser before starting the migration. If multiple browser windows are open with different accounts, use the one where the required Microsoft ID is already logged in, as authentication will proceed only in that browser.

Provide the Application (Client) ID, Client Secret, and Tenant ID to establish and authenticate the connection.

Enter Azure Application Details

Fill in the following information from your Azure app registration:

Field	Description
Application (Client) ID	Azure App Client ID
Client Secret	Secret generated in Azure
Tenant ID	Microsoft Entra ID (Azure AD) Tenant ID

If you choose Application Credentials Authentication (Client ID, Client Secret, and Tenant ID), you must first create an Azure App Registration and assign the required API permissions in Microsoft Entra ID (Azure AD).

For complete instructions on creating the Azure Active Directory application and enabling API permissions, visit:

Create Azure Active Directory and Enable API Permission Guide

Step 5: The migration window offers several options to control how mailbox data is transferred to Office 365.

Migration Scope: Select the mailbox data you want to migrate, such as emails, contacts, and calendar events.
Remove Duplicates: Prevent duplicate items from being transferred to the destination mailbox.
Follow Tree Hierarchy: Preserves the existing PST folder structure during migration.
Mapped with Default Mailboxes: Automatically maps PST data to the corresponding default Office 365 mailboxes.
Export to Custom Folder: Saves migrated data under a user-defined folder name.
Date Filter: Limits migration to emails and other supported data within a specified date range.

Step 6: Mailbox Mapping and Start Migration

The PST File Selection window lets users select PST files and map them to the appropriate Office 365 mailboxes from the drop-down list of target mailboxes. Click Save Mapping and Start to begin the process.

Note:

Only a licensed and valid mailbox can be selected as a migration destination. Unlicensed mailboxes cannot be selected.
Mailbox types may include User Mailbox and Shared Mailbox.

Import Users via CSV

Click Import CSV and browse to the CSV file.
Choose Sample CSV to download a sample CSV template file.
Select the required mailboxes and click Apply to continue.

Step 7: Monitor and Complete the PST Migration

After migration starts, monitor the migration progress and review transfer statistics in real time.

Network Status: Shows whether the connection is stable during migration.
Destination: Displays the target Office 365 mailbox and output location.
Progress: Shows the percentage of migration completed.
Item Count: Displays total items along with emails, contacts, events, and tasks.
Skipped: Shows the number of items skipped during migration.
Failed: Displays the number of items that could not be migrated.
Att Saved: Displays the number of email attachments successfully saved during the migration.
Data: Displays the amount of data processed.
Stop: Lets users stop the ongoing migration process.

Step 8: Click View Logs and select the log file to see detailed records of the migration process.

Step 4: Select the destination file format

Choose the required output format from the available options. The PST Viewer supports the following export formats: PST, MBOX, EML, MSG, PDF, and CSV.

Step 5: Configure Advanced Filters

Before exporting, select and configure the required export settings based on your needs.

Duplicate Handling: Detect and remove duplicate emails or contacts before saving.
Attachment Handling: Choose whether to keep, extract separately, save attachments as a page, or exclude email attachments.
Custom Folder: Save exported data using a custom folder name.
PDF Format: Select Single PDF to save each email separately or Merged PDF to combine emails from a folder into one PDF file. Auto-split single PDF larger than 500 MB.
Date Filter: Select a specific date range to export only the required data.
Split PST File: Divide the output PST into smaller files based on the specified size. Auto-split PST files larger than 45 GB.
Duplicate Email Filter: Identify duplicate emails based on selected fields such as sender, subject, recipient, and body, and save them in a separate folder.
Text Filter: Filter emails by specific To, From, or Subject criteria.
Skip Existing / Resume Export: Skip already exported data and resume incomplete exports without duplicating previously processed files.

Step 6: Click Browse to select the destination folder for the converted files. Once you specify the location, click Save to start the conversion. Press the Cancel button to go back.