“I need to export all my email data from the New Outlook application before switching to a different email client, but I can’t find the traditional export options that were available in the classic Outlook desktop application.” This question reflects a common challenge many users face when transitioning from classic Outlook to Microsoft’s New Outlook app application. The interface changes and feature relocations can make familiar tasks seem impossible to complete.
Addressing messages export limitations and available solutions
The New Outlook application represents Microsoft’s modern approach to email management, but it currently lacks the comprehensive export functionality found in classic Outlook desktop versions. This limitation affects users who need to create local backups, migrate to different email systems, or comply with data retention policies that require offline storage of email communications.
We’ll show multiple approaches to export mailbox data from New Outlook environments, including direct web-based methods through Outlook on the web, as well as more advanced PowerShell automation techniques, and alternative backup strategies. You will learn to navigate the current limitations while achieving your data export objectives through practical workarounds and Microsoft 365 administrative tools.
Implementing mailbox message items export methods
The most straightforward approach involves using Outlook on the web since New Outlook currently lacks direct export functionality. Navigate to outlook.office365.com and sign in with your Microsoft 365 credentials to access the web-based interface that maintains full export capabilities.
- Access the Outlook on the web interface by opening your browser and navigating to outlook.office365.com, then sign in using your organizational or personal Microsoft 365 account credentials.
- Click on the Settings gear icon located in the top-right corner of the Outlook on the web interface, then select “View all Outlook settings” from the dropdown menu.
- Navigate to the “General” section in the left sidebar, then click on “Import and export” to access the data management options available for your mailbox.
- Select “Export mailbox” from the available options, which will initiate the process for creating a downloadable archive of your email data including messages, contacts, and calendar items.
- Choose your export preferences by selecting the date range, folder selection, and file format options that best meet your backup or migration requirements.
- Click “Start export” to begin the process, noting that Microsoft will send you an email notification when the export file is ready for download, typically within 24-48 hours.
Expert Tip: Large mailboxes may take several hours or days to export completely. Plan accordingly and avoid making significant mailbox changes during the export process to ensure data consistency.

Alternative PowerShell export methods (experts only)
For users with administrative access, PowerShell provides more granular control over mailbox exports through Exchange Online management cmdlets. Connect to Exchange Online PowerShell using the Connect-ExchangeOnline command and authenticate with your administrative credentials to access advanced export functionality.
- Install the Exchange Online PowerShell module by opening PowerShell as administrator and running the command Install-Module -Name ExchangeOnlineManagement to prepare your system for remote management.
- Connect to your Exchange Online environment using Connect-ExchangeOnline command, then authenticate using your administrative credentials when prompted by the authentication dialog.
- Create a new mailbox export request using the New-MailboxExportRequest cmdlet, specifying the target mailbox, export path, and any filtering criteria for your specific export requirements.
- Monitor the export progress using Get-MailboxExportRequest cmdlet, which displays the current status, completion percentage, and estimated time remaining for your export operation.
- Download the completed export file from the specified network location or configure the export to save directly to an accessible file share location within your organization.
Compliance center export options
Microsoft 365 compliance center offers content search and export capabilities for comprehensive data retrieval across multiple mailboxes and locations. Access compliance.microsoft.com with appropriate administrative permissions to utilize these enterprise-grade export tools for larger-scale data extraction requirements.
- Navigate to the Microsoft 365 compliance center at compliance.microsoft.com and sign in using an account with eDiscovery administrator or compliance administrator permissions.
- Select “Content search” from the left navigation panel, then click “New search” to create a comprehensive search query targeting your specific mailbox data.
- Configure your search parameters by specifying the target mailboxes, date ranges, keywords, and other criteria that define the scope of data you want to export.
- Execute the search and review the results to ensure the query captures all relevant data before proceeding with the export process.
- Click “Export results” and choose your preferred export format, then wait for the system to prepare your download package containing all matching mailbox data.
Resolving common export challenges
Several technical issues commonly occur during mailbox export processes, requiring specific troubleshooting approaches to achieve successful data extraction. Understanding these challenges helps you prepare alternative strategies and avoid potential data loss scenarios.
- Export timeouts may occur when processing large mailboxes, requiring you to break down exports into smaller date ranges or folder-specific segments to complete the process successfully.
- Permission errors often prevent export completion, necessitating verification of your account privileges and potentially requesting additional administrative access from your IT department or Microsoft 365 administrator.
- File size limitations can truncate exports of extremely large mailboxes, forcing you to implement multiple smaller exports or utilize PowerShell methods with custom size parameters to capture all data.
- Network connectivity issues during long export processes may interrupt downloads, requiring you to restart the export process or implement resume-capable download methods to maintain progress continuity.
Important Tip: Always verify exported data integrity by spot-checking random messages and folders before relying on the export for migration or archival purposes.