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“Our team worked dedicatedly to bring this utility to you. Now, cloud backup and restore has become an easy task.”

Managing Director KernelApps

Why isOffice 365 Backup essential for you?

Security of the data is the most crucial aspect of any business. Although Microsoft ensures the protection of the Office 365 data with advanced features and retention features, it's beneficial to take extra measures and use Kernel Office 365 Backup & Restore due to various reasons.

Reduce Office 365 Mailbox Size

Reduce Office 365 Mailbox Size The backup of Office 365 mailbox helps users to reduce their mailbox size by deleting unnecessary emails. Also, it has the advantage that emails are available offline for accessing in Outlook. Your business communication can benefit from it.

Disaster Recovery Plan

Disaster Recovery Plan Disasters can happen to Microsoft owned servers too; if you do not have proper disaster recovery plans, then you will lose the data forever. In such cases, backups can be a great asset.

Meeting Regulatory Compliances

Meeting Regulatory Compliances Because of regulatory policies / compliances and legal requirements, you may have to keep data on-premises rather than on the cloud. So, mailbox backups ensure that you have data for legal requirements.

Office 365 Retention Policies

Limitations of Office 365 Retention Policies The retention policies for the Office 365 has many limitations. That’s why a backup is essential for you.

Salient Features

For a prior knowledge about what functions users are going to get, here we have described the exclusive features of the tool.

Office 365 Mailboxes to PST

Backup Multiple Office 365 Mailboxes to PST An Office 365 user can take backup of his Exchange Online mailbox to PST using this tool (without any administrative privileges). Meanwhile, Office 365 administrators can backup multiple mailboxes associated with his Office 365 account to Outlook PST.

Groups, Public Folders

Archive & Shared mailboxes, Groups, Public Folders Office 365 Backup tool can be used to take backup of archive mailboxes, shared mailboxes, user groups & public folder data. PST files can be imported to archive mailboxes, shared mailboxes, user groups & public folder too. This tool can backup even If your email address is different from the mailbox login ID (UPN).

Restore PSTs to Office 365

Restore PSTs to Office 365 The tool can import single/multiple PST files back to Office 365 (Exchange Online) and Exchange Server (on-premises & hosted). Thus, restoring the backed-up PST files is easy with this tool.

Hosted Exchange Mailboxes

Exports On-Premises/Hosted Exchange Mailboxes Office 365 Backup & Restore tool helps you backup Exchange Server mailboxes too. It supports on-premises/hosted Exchange deployments and all Exchange versions including Exchange 2016/2019.

Incremental Backup/Import

Supports Incremental Backup/Import If you have already backed up mailboxes (or imported PST to mailboxes) and want to perform it again after some data addition, you need not backup (or import) the already backed up (or imported) data. An option is provided to skip the already migrated data. It reduces the migration time.

Multiple Mailboxes

CSV to Add Multiple Mailboxes Use a CSV file to add multiple Office 365 and Exchange Server mailboxes/archive mailboxes. It saves the time and effort and accelerates the Office 365 backup/restore process. You can also search any mailbox by its name after all the mailboxes get displayed in the tool.

Running Multiple Instances

Running Multiple Instances The tool can run multiple backup and import jobs simultaneously. This feature makes it easy to initiate more migration tasks even while the first migration is under execution.

Data Filtering Options

Data Filtering Options Various filters integrated into the tool filters the mailbox content by folder, date, item type, etc. You can also avoid Empty folders and Deleted Item folder during backup and restore. Thus, filters help in selection of Office 365 mailbox backup.

Perform Without Outlook

Perform Without Outlook The software works even if Outlook is not installed in your system. Also, the tool has a simple user-interface that ensures simple and hassle-free Office 365 Backup and Restore.

Export/Import Report in CSV

Export/Import Report in CSV Office 365 Backup & Restore tool displays the reports of backup or the PST import tasks after its completion. This report can be saved in CSV format for future use.

Backup Data to Different Formats

Backup Data to Different Formats The multitasker tool backs up Office 365 or Exchange Server mailboxes data to multiple file formats. The file formats supported by this advanced tool for backup are – PST, MSG, MHT, HTML, PDF, DOC, DOCX, EML, etc.

Restore to Folders with the Same Name as of PST

Restore to Folders with the Same Name as of PST The tool lets users to save the PST files to Office 365 or Exchange mailboxes as separate folders with the same name as of the source PST file.

Separate Folder

Save Mailbox Hierarchy to a Separate Folder This advanced tool allows users to save the source mailbox hierarchy to a separate folder specified by the user. Also the original mailbox hierarchy is well maintained throughout the process.

Extensive Support

Extensive Support The tool supports any version of Microsoft Outlook or Exchange Server for backup/restore. It shows compatibility with all sort of Microsoft 365 plans and subscriptions as well. Also, PST files of all Outlook versions are supported.

Dual-purpose tool

Dual-purpose tool You can cover both backup and restore actions using the same interface as the software has no different functionalities to run the processes. So, no need to go for two separate tools.

Secure login

Secure & easy login The tool supports both Basic Authentication (using the Server name, Username, & Password) and Modern Authentication (using Tenant ID, Client ID, & Client Secret). So, it is convenient for all types of users.

Local backup

Local backup The software will save the backup in a user-defined folder. The file will remain completely offline until you want to restore it to the mailbox.

No need for an admin account

No need for an admin account With this tool, a single user can take a backup without the requirement of an admin account. The login page shows the correct method to provide the delegation rights to individual Office 365 accounts.

Unlimited Restoration

Unlimited Restoration While restoring the PST files, the user can choose an unlimited number of PST files. The software will save them in the required Office 365 mailbox after applying the suitable filters.

No post-action is required

No post-action is requiredAfter taking the backup of Office 365 mailboxes, the user does not require to perform any other action. The mailboxes will adjust completely in the PST files quickly, with the same folder hierarchy.

Data which you can

Backup email messages from mailbox folders

Emails Backup email messages from mailbox folders such as Inbox, Outbox, Junk, Deleted Items, Sent Items, etc.

Backup all kind of attachments

Attachments Backup all kind of attachments like documents, media files, etc.

Backup contacts with complete information

Contacts Backup contacts with complete information like Contact Number, Address (both home and work), Email ID, other information, etc.

Backup the exact hierarchy & structure of the mailboxes Backup the default

Hierarchy Backup the exact hierarchy & structure of the mailboxes Backup the default or applied priorities and categories on emails

Backup all calendar entries

All Items Backup all calendar entries like appointments, meetings, events, venue, category, etc.


Follow given steps that will backup and restore Office 365 mailboxes to PST file and vice-versa using this one tool:
  1. Run Kernel Office 365 Backup and Restore software.
  2. Select Backup and add the Office 365 account after login.
  3. Select first option of Migrate above mentioned mailbox only.
  4. Select type of migration - mailbox, archive mailbox, or public folder.
  5. Apply data filters before saving in PST and click I’m OK, Start Migration.

Similarly, with the help of Office administrator account credentials, users can backup and restore bulk Office 365 mailboxes to PST files and vice-versa.

No, the tool creates a separate PST file for each mailbox. It reduces the complexity of the backup process and also the size of PST file.
The tool includes a special Exclude empty folder option in Filter Selection page. Users can use this option to exclude empty folders while backing up or restoring.
At the user-defined location. While performing the Backup operation, the tool lets the user select a location for saving the PST file.
Add Office 365 account global admin details and Office 365 group ID as source. The content in it will be listed instantly and you can migrate selective data to PST file.
Yes. The tool can efficiently work even without a license. But the free version can backup only 10 items per folder from the Office 365 mailbox to PST.
No. You do not need to take backup of 8 GB again, but you can choose to skip already migrated items while filtering the Mailbox.
The integrity of emails remains same and there is no change in text, attachments etc. Even the status of emails (Read/Unread) is preserved.
Not required. Your PST files that are locally stored on your system would be enough.
If you want to migrate the deleted items folder as well, just confirm that Exclude Deleted items checkbox is unmarked or cleared in the Filter Selection dialogue box. This will migrate PST file data along with deleted items.
Yes, of course. It supports running multiple instances of the tool for backup and restore operations.
Using the free demo version of the tool, you can gain experience with the features of the tool. Additionally you can back up 10 items per folder of your added Microsoft 365 mailbox.

How it Work's


Software Prerequisites & Recommendations

About Software

  • Version


  • Release Date

    View History

  • License Type

    Corporate & Technician

  • Version Support

    Outlook PST File-Office 365/ 2019/ 2016/ 2013/ 2010/ 2007/ 2003/ 2002/ 2000/ 98 and 97, Window OS-Windows 11/10/8.1/8/7/Vista/XP/2000/98/NT and 95 and Windows Server 2016/2012/2008 R2/2008/2003 R2/2003, Supported Plans- Office 365 Enterprise E1, Office 365 Enterprise E3, Office 365 Enterprise E5, Exchange Online Plan 1, Exchange Online Plan 2, Office 365 Business Premium, Office 365 A1, Office 365 A3, Office 365 A5, Office 365 F1, Office 365 Business Essentials

System Requirements

  • Hard Disk

    50 MB of disk space

  • Memory

    Minimum 64 MB RAM (128 MB recommended)

  • Processor

    Intel® Pentium Processor compatible (x86, x64) or equivalent

Software Guides

User Reviews

Kernel Office 365 Backup & Restore

(4.9 / 5) 452 Reviews

The health of Office 365 increases substantially after saving your emails in PST file and making your mailbox lighter and responsive.

Yesterday 2:12pm

The pricing of the software is challenging and I bought it during Christmas as we were doing some extensive email marketing.


I like this software very much. It helped me to backup Office 365  to PST format. It is a very easy-to-use tool that a non-technical person also can handle it.

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