If you’ve been waiting to export mailbox to PST in New Outlook, the wait is (almost) over! Microsoft is rolling out this feature in phases, and while it’s not fully functional yet, we’re getting closer with every update.
Why does this matter? PST files are essential for backups, migrations, and archiving your mailbox. Whether you’re managing multiple accounts or just want peace of mind, this guide will help you export mailbox to PST from New Outlook quickly and correctly.
What’s New with PST Export in New Outlook
The new Outlook experience brings a modern interface and streamlined features, but until recently, PST export wasn’t available. Now, you can:
- Export mailbox to PST from New Outlook (entire mailbox or specific folders)
- Include Calendar and Contacts (currently read-only)Â
Important: Calendar and Contacts are still read-only in PST files. You can view them, but you can’t edit or create new items from the backup.
Step-by-Step Guide to Export Mailbox to PST
Follow these steps to export mailbox to PST from New Outlook:
1. Check Your Mailbox Size
Before exporting, review your mailbox size and available storage. Large mailboxes (30GB–60GB) take longer and require more disk space. How to check:
- Go to View > View Settings > Storage
- Review the size and plan accordingly
2. Start the Export Process
- Navigate to File > Open & Export > Outlook Data Files
- Click Export > Get Started
- Select the account you want to export
Tip: If you don’t see Export in your New Outlook settings, you must export using Outlook Classic and then add the account in New Outlook.
Watch this video for details: How to Import New Outlook PST and Avoid Duplicate Names?
3. Choose What to Export
- Entire mailbox (recommended for full backup)
- Specific folders (ideal for large mailboxes or projects)
4. Handle Duplicate PST Items
When exporting to a PST file, Outlook gives you three options for handling duplicate items. Choosing the right one is important for keeping your backup clean and manageable:
- Skip Duplicates (Recommended):
This option ignores any duplicate items during export. It’s the safest choice for most users because it prevents unnecessary file bloat and keeps your PST organized. - Replace Duplicates:
If an item already exists in the destination PST file, this option replaces it with the new version from your mailbox. Use this if you want the most recent copy of every item. - Keep Both:
This creates multiple copies of duplicate items, which can significantly increase the size of your PST file. Only choose this if you need every version of an item for compliance or auditing purposes.
Pro Tip: If you’re exporting to an existing PST file, “Skip Duplicates” is usually the best choice to avoid confusion and oversized files.
5. Set Time Range (Optional)
- Export all items or filter by date (e.g., older than 1 year).
When exporting your mailbox to a PST file, you have the option to export all items or filter by a specific date range. This feature is especially useful for managing large mailboxes or creating targeted backups.
Why use a time range?
- Reduce File Size: Large mailboxes can take hours to export and create massive PST files. Limiting the export to older items or a specific period keeps the file manageable.
- Project-Based Backups: If you only need emails from a certain project timeline (e.g., Q1 2025), setting a date range ensures you export only relevant data.
- Compliance or Archiving: Organizations often need to archive emails older than a certain date for compliance. This option makes that easy.
Use Cases:
- Example 1: You have a 50GB mailbox but only need emails from the past year for a migration. Set the range to “Last 12 months” to speed up the process.
- Example 2: You’re preparing for an audit and only need emails older than 2 years. Filter by date to export just those items.
- Example 3: You want to archive project-related emails from January to June 2025. Apply that custom range for a focused backup.
Pro Tip: If you’re unsure, start with a smaller range to test the export speed and file size before committing to a full mailbox export.
6. Name Your PST File
When naming your PST file, use clear, descriptive naming conventions so you can easily identify it later. A good format is:
MailboxName_Backup_MonthYearExample:
AdeleV_MailboxBackup_Dec2025After naming your PST file, select a location on your computer where the file will be stored.
C:\Users\<YourUsername>\DocumentsThis is the default Documents folder in Windows Explorer, which is easy to access and organize.
- It’s secure and user-specific.
- Easy to find when you need to import or verify the PST file later.
- Keeps backups organized in one place.
7. Password Protection (Optional)
- Prevents unauthorized access to your PST file.
- Ideal for shared environments or when storing backups on external drives.
Choose a strong password and store it securely. If you forget the password, Outlook cannot recover it, so keep it in a safe place.
8. Monitor PST Export Progress (Tips You Need!)
Once you click Export, the process begins—but here’s what you need to know:
- Click Export Once: Avoid clicking multiple times. The interface doesn’t show an immediate progress indicator, so pressing twice can create duplicate exports.
- Progress Details: Outlook will eventually display the number of items being exported and the progress bar. This helps you track completion.
- Continue Working: You can keep working in Outlook while the export runs in the background. However, do not close New Outlook during the process.
- Resume Option: If you accidentally close Outlook, you’ll see a prompt to resume the export when reopening.
- Cancel Option: If you started an export by mistake, you can cancel it before it completes.
- Time Expectations: Export speed depends on mailbox size. For example:
- 1,600 items (~small mailbox): ~10 minutes
- 5GB mailbox: ~1 hour
- Large mailboxes (30GB–60GB): Several hours
Plan accordingly—grab a coffee and let it run!
Pro Tips
- Large Mailboxes
- Allow plenty of time (5GB can take an hour; 30GB may take several hours)
- Consider exporting in smaller chunks (folders or date ranges)
Validate Export:Â Always verify the export history after completion to ensure all items were successfully backed up.
9. Rename the PST Display Name
After exporting your PST file, it’s a best practice to rename the display name in Outlook so it’s easy to identify in your Navigation Pane. By default, Outlook assigns a generic name, which can be confusing if you manage multiple PST files.
How to Rename the Display Name:
- Go to File > Account Settings > Data Files.
- Select the PST file you just exported.
- Click Settings, then update the Name field to something descriptive.
Recommended Format: 
️ MailboxName_Backup_MonthYear
Example:Â Â AdeleV_MailboxBackup_Nov2025
- To Access the emoji, press Windows key + .
Why add the emoji?
- It visually signals that this PST file is a backup, not your active mailbox.
- Helps you quickly distinguish between live accounts and archived data.
Pro Tip: Always double-check the file name and display name for clarity before saving. This makes future imports and troubleshooting much easier.
PST Calendar & Contacts in New Outlook: What You Need to Know
Currently, when you export your mailbox to a PST file in New Outlook, Calendar and Contacts are included for viewing only—they cannot be edited or used to create new items.
Microsoft is rolling out PST export in phases, and full functionality for Calendar and Contacts hasn’t been implemented yet. The read-only limitation exists because:
- Data Integrity: PST files are designed as static backups, not live data sources. Allowing edits could cause sync conflicts with your primary mailbox.
- Feature Rollout: Microsoft is prioritizing core mailbox export first. Calendar and Contacts editing will come in future updates as part of the roadmap.
- Consistency Across Platforms: Outlook on the web and desktop apps handle PST differently, so Microsoft is ensuring compatibility before enabling full write access.
What does this mean for you?
You can view Calendar events and Contacts in the exported PST, but you cannot add, edit, or delete items. If you need full functionality, continue using your primary Outlook account until Microsoft releases the update.
Reminder, watch the latest video that demonstrates the readonly mode behaviors and other discoveries.Â
What's Coming Next
Microsoft is actively improving PST functionality in New Outlook. Expect updates for Calendar and Contacts soon!
Now, go and work your magic!
