Reconnect a Disconnected Mailbox within MS Exchange Server

Reconnect a Disconnected Mailbox within MS Exchange Server

The mailboxes that are disconnected remain on the databases of Exchange Server for a period of time until retention time is over. If you’re experiencing problem of not being able to access your mailbox In this article, you’ll learn about the possible solutions to reconnect an unconnected mailbox on the Exchange server.

Let’s begin by examining the known facts about the mailboxes that are not connected.

Related Blog: How to sync Gmail account with MS Outlook

How do Mailboxes are Disconnected from Exchange Server?

The mailbox objects are not associated with the account of the user in Active Directory and are automatically removed when the default time-frame (30 days) expires. This is referred to as an disengaged mailbox. Exchange administrators have the ability to connect the mailbox that is disconnected when the need arises, however only within the period of retention.

This is about mailboxes that are disconnected. It is important to understand this by the following scenarios:

If Exchange Mailbox is disabled –

The Exchange mailbox is still on the server’s database however, it is not accessible due to its disabled status. It remains disabled until the retention time (default thirty days) is over, after which it will be removed from the database following it has expired.

If Exchange Mailbox is soft-deleted or removed

These mailboxes are also known as disconnected mailboxes because a user cannot access it until they are connected to their account. After the time period of retention the mailbox that was deleted softly can be retrieved.

Continue to study the various ways to use it manually. The manual procedures are available for both Exchange server 2010 and 2016.

How do I reconnect a disconnected Mailboxes in Exchange Server 2010?

There are a variety of steps that must be followed according to the following steps:

Step 1: Verifying your Deleted mailbox retention Policy

  1. In the beginning, first open first the Exchange Management Console (EMC).
  2. Extend Microsoft Exchange On-Premises (server name) in the navigation pane.
  3. Expand the Organization Configuration
  4. Choose a Mailbox
  5. Next, click on next, the Database Management tab in the Mailbox pane.
  6. Visit the Mailbox Database that you are investigating and click on the right-click.
  7. Go to properties and then click the Limits Tab
  8. Verify the deletion settings, and make adjustments as necessary.

After you’ve reviewed your retention policies for deleted mailboxes, it will be clear whether the mailbox you deleted remains accessible. Since Exchange retains the mailboxes that were deleted and shuts them down them for a short period of time, you’ll need to review the list of mailboxes that have been disconnected.

Step 2: Access to Mailboxes that are not connected

  1. The expansion of Microsoft Exchange Off-Premises (server Name) under the EMC
  2. Then , expand the Recipient Configuration
  3. Select disconnected mailboxes

It is possible to find the mailbox you wish to retrieve under mailboxes that are not connected. Don’t panic when you don’t see a listing of the recently deleted mailboxes here. Mailboxes deleted will not show in the mailboxes to be deleted until Exchange cleans its database. This procedure involves giving Exchange being the primary directory for all mailboxes disconnected, and then changing Exchange store.

Step 3: Cleanse Mailbox Databases

  1. Start typing and hit Enter. Exchange Management Shell
  2. Right-click on Exchange Management Shell >> Run as Administrator
  3. Type the following command when it prompts: Get-Mailboxdatabase | Clean-MailboxDatabase

If it does not return to the command line, you’ll be able to open your Exchange Management Console and see the deleted Mailbox in the list of disconnected mailboxes successfully. When you right-click on it, you’ll attempt to reconnect the mailbox connect it, then follow the instructions.

There are numerous instances that this method might not be effective. You can use this method to connect an Exchange mailbox. Exchange Power Shell to reconnect an unconnected mailbox on the Exchange server, and then check the settings for the account.

Step 4: Connecting the Mailbox and verifying

  1. At first, you must open Exchange Power Shell as Administrator
  2. Then, type and execute this command
    Connect-Mailbox -Identity “username” -Database “Mailbox Database” -User “username”.
  3. Return to Exchange Management Console.
  4. Expand Configuration of Recipients.
  5. After that, refresh the your disconnected mailboxes.
  6. Select the mailbox in the Recipient Configuration.
  7. After that, double click on the restored mailbox.
  8. Examine your Alias in the tab General.
  9. Examine the STMP address in the E-Mail addresses tab.

If all goes well, log in to Outlook or OWA and review and confirm the sending or receiving.
These are the simplest steps to reconnect the mailboxes which have been disconnected. These steps are complicated. To avoid the hassle, you could convert EDB to PST to convert the mailbox stored in Exchange database to PST that later transferred into the Exchange database to connect.


We have provided “how mailboxes are disconnected from Exchange server” in the first part and the following section filled with manual methods to reconnect a mailbox that has been disconnected in the Exchange server. To avoid the difficulties of manual methods, an easy method is to use Regain Exchange Server Recovery tool. If you’re facing additional difficulties such as the inability to connect to Exchange Server then you could read through our article. I hope you find it useful.

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