Recover Deleted Items Outlook: M365 Restore Options

Microsoft 365 recovery options are limited

It’s a sobering fact that one in three organizations are impacted by SaaS data loss due to commonplace things such as human error.

Let’s say you mistakenly delete a vital email or other type of file in M365 and discover the error days or weeks later. What are your options for recovery? There are two, but both come with time limitations, so you need to act quickly.

Key Takeaways

  • Microsoft 365 native recovery is time-sensitive, typically limited to a 14 to 30-day window.
  • Data is permanently lost if the Recycle Bin is manually emptied or storage limits are exceeded.
  • Only the original user who deleted the file can perform a native recovery.
  • Augmentt Backup offers an unlimited retention alternative that prevents accidental or manual deletion.
  • Third-party backups allow administrators to restore data to different users or export files in PST/EML formats.

The 14-day option

The M365 Recoverable Items folder (often called the “second-stage recycle bin”) stores anything you delete for 14 days by default. To restore an item, open Deleted Items, select Recover items recently removed from this folder, pick what you need, and click Recover.

Files recovered this way automatically return to their original location. After 14 days, deleted items are no longer accessible through this route, although in some cases the Office 365 administrator may have access to them.

The 30-day option

Need more time? Outlook keeps everything you delete in the Deleted Items folder for a full 30 days by default (your admin can shorten or extend that window). During this period you can simply right-click the item, choose Move → Other Folder, and put it back where it belongs.

The Recycle Bin temporarily stores deleted data for 30 days (or for another time limit set by the administrator). During this period, if the user does not manually empty the bin, deleted items can be recovered fairly easily by right-clicking and moving the item to the desired destination.

These M365 recovery methods may cover most users in the short term but are clearly inadequate for long-term retrieval. Additional limitations with these methods include:

  • Empty the Deleted Items or Recycle Bin and the data is immediately hard-deleted.
  • Mailbox size counts what’s in those folders, so the 50 GB quota can fill up fast.
  • Only the original user—or an admin with elevated rights—can run a self-service restore.
  • After 30 days, admins must fall back on eDiscovery or PowerShell to attempt recovery, adding time and cost.

Unlimited recovery with Augmentt Backup

While M365 recovery methods are limited and time-sensitive, fortunately Augmentt Backup presents a permanent back up alternative that enables easy access to all M365 data regardless of when it was deleted.

That’s because files stored in Augmentt through an M365 account remain there indefinitely and the platform does not allow end-users to access storage to manually alter or delete data. (Of course, administrators can remove user accounts from backup if necessary.)

With Backup, you can restore items back to the original owner, restore them to a new user, or export files in a compatible PST format.

The recovery process is simple and flexible:

  1. Log in and select Restore and Download from the left menu.
  2. Select the appropriate account and user.
  3. Use Via Item Search to find specific emails, contacts, events, or tasks.
  4. Select the required file and click Restore.
  5. Choose to restore to the original user or a new one.

When downloading deleted files to your own storage, you can export mail files in Outlook-compatible PST format or standard EML, VCF, or ICS formats. Once you’re finished, the system will send an email notification of the restored item.

Frequently asked questions

How do I recover permanently deleted Outlook emails after 30 days?

Outlook’s built-in tools can’t bring back items once they’re past the Recoverable Items limit (14–30 days, depending on your admin settings). After that window closes, you’ll need a backup service. Augmentt Backup stores every message indefinitely, so you can restore it to the same mailbox, another user, or export it as a PST file—no time limit.

What happens when I empty the Deleted Items folder in Outlook?

The email first moves to Outlook’s hidden Recoverable Items folder. It stays there for up to 14 days by default (your admin can raise this to 30). After that period—or if the item is purged manually—it’s gone for good unless you have a separate backup like Augmentt.

Can an administrator restore another user’s deleted Outlook items?

Yes—if the item is still within the Recoverable Items retention window. An M365 admin can use the eDiscovery or Content Search tools to restore or export data. Once that window passes, only a third-party backup such as Augmentt can recover it.

How quickly should I act after deleting an Outlook item?

Act within 14 days for the fastest “Recover Deleted Items” option, and no later than 30 days if your admin has extended retention. After that, recovery requires a backup platform.

Secure M365 data indefinitely with Augmentt Backup

To err is human but our Backup platform eliminates all risk of lost files across all Microsoft 365 (Office 365) data: Mail, Calendar, Contact, OneDrive/SharePoint, Groups/Teams, and Tasks. And there’s no regulatory risk with Backup, either. The platform’s proven security credentials ensure that you’ll always maintain compliance.

Gavin Garbutt
Co-Founder & Chairman of Augmentt

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