Read time 9 minutes

Summary: In Exchange 2010, accidentally deleted mailboxes can be recovered within a 30-day retention period. Verify the retention policy, check disconnected mailboxes, and force clean the database if needed. You can reconnect deleted mailboxes to existing or new user objects manually. For permanent deletions, consider using Kernel for Exchange Server Recovery, a tool that retrieves and restores deleted mailboxes, offering flexibility for data migration. It’s essential to act promptly to avoid irretrievable data loss.

Recovering an accidentally deleted Exchange mailbox can be an incredibly frustrating experience for users, given that the deletion not only removes the mailbox but also the associated user account. Fortunately, there’s a silver lining: in Exchange 2010, mailboxes are never permanently obliterated. When you unintentionally delete a mailbox in Exchange 2010, it becomes disconnected from your account and is retained in the directory for a default period of 30 days—this is known as the mailbox retention period. Within this timeframe, you have the opportunity to reestablish any deleted mailbox.

Recover Deleted Mailbox in Exchange 2010

Once the retention period concludes, the mailbox will undergo permanent deletion. To reconnect a mailbox, it’s essential to ensure the deleted mailbox retention policy is in order. Follow the steps below to verify the retention policy:

  • Go to Exchange 2010 Management Console and expand Microsoft Exchange On-premises in the navigation pane.
  • Expand Organization Configuration and select the mailbox for which you want to verify the retention policy.
  • Select the Database Management tab in the Mailbox pane.
  • Click on the respective Mailbox Database that you want to verify.
  • Choose properties and click the Limits Tab.
  • Verify the detention policy or settings and adjust the days according to your requirements.

After verifying the retention policy, you’ll get to know whether the deleted mailbox you want to connect to is still available or not.

Instant Solution

Try automated Exchange Recovery tool to recover deleted mailbox data from Exchange server 2019, 2016, 2013, 2010 and previous versions.

Checking Disconnected Mailboxes

Also, you’ll have to check the Disconnected Mailbox list, as Exchange 2010 disconnects deleted emails.

Note: After the deletion of any Exchange mailbox, it would take about 15 minutes to 1 hour to get it listed in the disconnected mailbox list from the time of deletion.

Here’s how you can access disconnected mailboxes.

  • Go to Exchange Management Console and expand Microsoft Exchange On-premises
  • Now, expand Recipient Configuration and Select Disconnected Mailboxes.
  • Here you can find the deleted mailbox

However, if you don’t find a recently deleted mailbox in disconnected mailboxes, then don’t panic. Deleted mailboxes don’t appear in the folder until Exchange 2010 cleans its database.

Force Cleaning Exchange Mailbox Database

The process of cleaning the database takes some time, but you can also force Exchange 2010 to clean databases. Follow the below steps to force Exchange 2010 to clean the database.

  • Go to Start and type Exchange Management Shell
  • Now, right-click Exchange Management Shell and click Run as administrator
  • A prompt will appear on the screen, enter the following command to it:
    Get-Mailboxdatabase |Clean-MailboxDatabase
  • If the next command line returns, the cleaning database has been completed successfully.

After cleaning the Exchange 2010 mailbox database, you can recover the deleted mailboxes. Here how:

Recovering Deleted Mailboxes in Exchange 2010 (Within Retention Period)
  1. Go to Exchange System Manager and locate the mailbox store that contains disconnected mailboxes
  2. Under the mailbox store, select the Mailboxes object
  3. Now, right-click on the disconnected mailbox, and then select Reconnect
  4. Select the mailbox type and click Next.
  5. Select the appropriate user using the Browse option under the Existing user section from the opened wizard and click Next.
  6. Note: Disconnected mailboxes already associated with another mailbox cannot be reconnected to a user account.

Using this technique, only one user can connect to a mailbox because to be unique across an entire forest, all globally unique identifiers are required.

Reconnecting Deleted Mailboxes to a New User Object

You can also reconnect a deleted mailbox to a new user object using Active Directory.

  1. Go to Active Directory Users and create a new user object.
  2. While creating a new user object, click to clear the Create an Exchange Mailbox checkbox.
  3. The user account will be connected to an already existing mailbox.
  4. Now, follow the same steps of Recovering Deleted Mailboxes in Exchange 2010 as mentioned in the previous section.

Using this manual technique, you can quickly recover deleted mailboxes that are available in disconnected mailboxes. However, this technique doesn’t work if the mailbox is permanently deleted from the Exchange 2010. So, how will you recover permanently deleted mailboxes from Exchange 2010?

Use a Professional to Recover Deleted Mailboxes

Introducing an advanced tool designed to effortlessly retrieve every item from Exchange Server 2010 files. Not only can it seamlessly recover data, but it also possesses the capability to restore corrupted or damaged Exchange 2010 databases. Exchange Server automatically generates an EDB file on your computer, housing the complete server data. With Kernel for Exchange Server Recovery at your disposal, you can even recover mailboxes that have been permanently deleted from Exchange 2010. Once you’ve successfully restored the deleted mailbox, you have the flexibility to either convert it to the PST format or seamlessly migrate it to a Live Exchange server. To gain a deeper understanding of how this software operates, let’s delve into its working process.

Adding EDB File as a Source

  1. Download and install the Kernel tool on your system.
    Download Kernel Exchange Server Recovery
  2. After launching the tool, select Offline EDB File as the source and click Next.
    Select Source Type
  3. Select the EDB file from the system by clicking the Browse button and click Next to proceed ahead.
    Select EDB file
    Note: You can also search for a specific Edb file with the search feature.
  4. Select any method for scanning the Exchange 2010 EDB file and click Next.
    Select scanning mode
  5. The EDB file will be added, and the deleted mailboxes will be visible in the red color.
    Source list
    Now, from here you can save these mailboxes in PST, MSG, and EML formats if you want to migrate Exchange 2010 data to Office 365 mailboxes. Here, we will export the mailboxes to Live exchange so that you can access the permanently deleted mailboxes of Exchange 2010 within Exchange Server.

Adding Live Exchange as Destination

  1. Select Add Destination to add Live Exchange for EDB migration and click Next.
    Add Destination
  2. Enter the credentials and related information for Live Exchange Server.
    Enter the credentials
  3. Now, select the mailbox to which you want to migrate the data and click Next. The Live Exchange mailboxes will be added to the tool.
    Select Users
  4. The Live Exchange mailboxes will be visible on the down left-hand side.
    Destination list

Migrating EDB to Live Exchange

  1. To restore the Deleted mailbox from EDB to Live Exchange. Right-click on the Deleted Mailbox folder and select copy mailbox.
  2. Go to the destination folder and click Paste Mailboxes.
  3. If there are multiple mailboxes, then the software will ask you to select specific mailboxes if any, else click Next.
    Select Mailboxes Want To Migrate,
  4. Apply the filters on the deleted mailbox, such as item type, date range, skip folders, etc. and click Next.
    Apply the filters
  5. Map the mailboxes when the Mapping Wizard appears on the screen and click Next after the mapping is done.
    Map the mailboxes
  6. The restoring process will take some time based on the size of deleted mailboxes. A notification will appear on the screen after completion as shown below. Click OK first, and then click Finish to end the process.
    Migration Completed

With this method, recovering deleted mailboxes from Exchange 2010 and seamlessly restoring them to your Live Exchange becomes effortless. This tool stands out as an exceptionally straightforward solution for retrieving deleted mailboxes from Exchange 2010 and facilitating their restoration to a variety of destination locations, including Microsoft 365.


Users may inadvertently delete mailbox content or entire folders. If you discover such accidental deletions after the recovery period has expired, your data will be irretrievably lost. To increase the chances of recovering permanently deleted files, consider utilizing Exchange Mailbox Recovery software. This tool efficiently restores deleted files and highlights them in bright red for easy identification. Notably, the software doesn’t necessitate the presence of log files to recover mailbox items, simplifying the retrieval process.

Kernel for Exchange Server