Office 365 Online Archive Backup: Complete Guide

  Rollins Duke
Rollins Duke   
Published: September 10th, 2025 • 8 Min Read

This article will discuss the reasons for Office 365 online archive backup, along with the different ways to back up archived emails. We will describe the manual steps on how to backup online archive Office 365 and also a professional solution that will yield a reliable result. By the end of this article, you will be able to choose the best way to safeguard your Office 365 archive data.

What is Office 365 Online Archive?

Office 365 Online Archive provides extra mailbox storage capabilities for Microsoft 365. This can help a user manage large volumes of email without overloading the primary mailbox. An online archive becomes available when enabled and it works side by side with the existing mailbox, giving the user an additional up to 100 GB of access space.

In other words, you can move old emails or emails you rarely use into the archive. This frees up space in your primary mailbox while maintaining your data at your finger tips anytime. It has a backup located on Microsoft’s servers and can be accessed anywhere through Outlook or Outlook Web App. A lot of users feel better about having an Office 365 online archive backup for that extra sense of security against accidentally losing an email, and it improves mailbox performance.

Reasons to Office 365 Online Archive Backup

There are many users searching for reliable ways to backup online archive Office 365 due to different personal or professional needs. Some want to secure their crucial data from accidental loss, while others look for better storage management. To understand the key reasons and benefits of Office 365 online archive backup, explore the points shared below:

  • To safeguard crucial mailbox data from any type of data loss, malware attack, corruption, etc. 
  • To get easy and quick offline access to some data files.
  • Outlook 365 online archive frees up storage space and helps in managing the database in a better or saturated way. 

Note: The reason for Outlook online archive may vary from one user to another depending on their respective scenarios. Therefore, the below-shared solutions for the Outlook online archive are versatile and applicable to all cases related to this matter. 

How to Backup Online Archive Office 365​ Manually? 

The conventional way to Office 365 online archive backup is via Outlook 365 itself. Thus, the steps to use this traditional way are as follows:

  1. First of all, open Microsoft Office Outlook.
  2. Now, find the email/item that you want to archive online.
  3. Next, right-click on it and select the “Move” option. 
  4. Finally, choose the “Inbox-Online Archive” option and you are done with the Microsoft 365 online archive backup successfully. 

Limitations: This traditional method for Office 365 Outlook backup online is good to go for a small database archive as it does not perform well for large mailbox online archives. In addition to this, the manual method is also very time-consuming as it asks the user to archive each item separately which makes it hectic and unprofessional.

Office 365 Online Archive Backup Tool – Expert Solution

Archiving your Office 365 mailboxes can protect you from various catastrophic situations. For example, if you have deleted a mailbox unintentionally, the only way to settle this circumstance is to look for those Office 365 online emails in the email archives. But what if you don’t have that email archive? You can just envision the result of the story: you would lose your important as well as urgent archive mailboxes. Therefore, it becomes a mandate to do Office 365 online archive backup.

To help you out from these future disasters, we are here to help you out! BitRecover Office 365 Backup Software is certainly meant to deal with taking the backup of O365 archive mailboxes into a variety of file formats.

It offers you the following features:

  • Take all elements including Office 365 archive backup of emails, contacts, calendars, contacts, etc.
  • Availability in more than 10 popular file formats for O365 online archive backup.
  • Option to extract data from multiple user accounts of Office 365 at once.
  • Operable on all Windows OS including Windows Server versions too.
  • You can efficiently move the Office 365 online archive back into the mailbox after conversion.
  • Users can export Office 365 online archives to PST and other formats without any limitations.

Now, let’s look into the solution for how one can backup Office 365 online archive backup.

Quick Glimpse of Pro Steps 

Step-wise instructions for backup online archive Office 365​:

  1. Run the software and enter Office 365 account credentials.
  2. Select the desired O365 mailbox folders whose data you want to backup.
  3. Choose the required saving format to backup online archive Office 365 email.
  4. Specify a destination location and click on Backup to begin the process.
  5. MS Office 365 online archive backup completed.

How to Backup Online Archive Office 365​? Step-by-Step

To check the tool’s functions, download the free demo version of Office 365 archive backup software. Then, you can switch to the license version for unlimited take backup of online archive Office 365​.

  1. First of all, install the above mentioned Office 365 online archive backup on your system.  Office 365 online archive backup tool
  2. Now, enter MS Office 365 account credentials and hit the Next tab to begin the process.credentials for online archive office 365
  3. Enable the “I am Admin option” and enter the credentials of the administrator account which has Mail Delegation and Impersonation rights to be enabled for Office 365/ Exchange Server backup.
  4. Here, at this step, the tool will fetch mailboxes from the 0365 account automatically into the GUI. Check on the desired archive email folders to move to the next step.check desired folders
  5. Thereafter, go to the saving options list and pick the PST option.saving option for outlook online archive
  6. You can also use the advanced settings option for selective backup to take backup of archive mailboxes from Office 365 by Date Range, From, To, Subject, etc.advance setting option
  7. Enter a required destination location (or Change it as per requirement) and click on the Backup button to create Office 365 online archive backup.destination of Microsoft 365 Online Archive backup
  8. The backup process finished with a completion message at the end. It will open the chosen destination path where your 0365 online archive mailboxes are saved in .pst file format.completion message

Explanation Behind O365 Archive Backup

Emails are the foundation of business and most of the organizations. On-account of messages, individual information, agreements, and a wide range of significant data can be safely and handily moved or saved. Shockingly, sooner or later, all information can be lost due to sudden data loss, email deletion, or email corruption. For various reasons an Office 365 online archive backup plays a cruicial role.

  • Unexpected deletion – It is frequently seen that whenever you clean up your mailboxes, then some significant messages can be erased accidentally. In the event that an email is deleted for all time, thereafter it is highly unlikely to recover it, other than by taking a backup of those archive mailboxes.
  • Equipment glitches or system crashes – Mishaps occur, and once in a while, for no obvious explanation. The information saved in archive mailboxes can get deleted which is unrecoverable. It applies both to information stored on PCs and to email service providers.
  • Vindictive software – The cybersecurity market is making a valiant effort to shield PCs from infections and various malignant software, however, there is consistently an opportunity that a virus can cause significant damage.

Any of these situations can land you in big trouble. So, the better option is to know how to backup Office 365 online archive mailboxes.

FAQs: Office 365 Online Archive Backup

1. How to take backup of online archive Office 365​?

To Office 365 backup online archive, a user can either choose the manual way to export each item one by one or go with expert-suggested Office 365 online archive backup tools for safe, reliable, and unaltered transfer. 

2. What are the benefits of online archive Office 365?

It acts as a backup for crucial data and protects it from getting lost during any digital attacks. Moreover, it also helps in saving a lot of Office 365 storage space which boosts the efficiency of the platform. 

3. What does online archive mean in Microsoft Outlook Office 365?

So, an online archive is basically a cloud space of Outlook 365 to archive and save old emails. It works like an extra label to store emails apart from the primary mailbox. Moreover, it is present on the Microsoft server and can be easily accessed from the Outlook web.

Conclusion

Always remember to keep a Office 365 online archive backup for unexpected email data losses. What is more important, is that you can move the Office 365 online archive back into the mailbox once you have the backup copy. Hopefully, we have provided all necessary reasons, explanations, and simplistic approaches to cope with this problem of “how to backup Office 365 online archive mailboxes”.


Live Chat