How to Fix The Exchange Database Not Mounting Error?

Before you access your database on an Exchange server, you need to mount it. While mounting your database can be a simple task, there are times when users encounter unwanted issues with it. For instance, you might get errors like “Unable to mount database hr0x80004005 ec1108” or “Failed to mount database: An active manager operation failed Exchange 2013”. Don’t worry, in this post, I will let you know how to resolve these Exchange database not mounting errors in every possible way.

Exchange Database Not Mounting Banner

Part 1: Things to Know about the Exchange Database Mounting Errors

You might already know that before accessing our mailbox data on an Exchange server, we need to mount it. Though, if the database has been corrupted, has unavailable log files, or went through a dirty shutdown, then the Exchange database will not mount.

Instead, it will display any other logical mounting error on the screen, such as:

  • Unable to mount database hr0x80004005 ec1108
  • Failed to mount database: An active manager operation failed Exchange 2013
  • Failed to mount database 'EXDB01'
  • Failed to mount database exchange 2016
Exchange Database Mounting Error

Apart from displaying their error code, Exchange will also present additional details about them that would help you troubleshoot the issue.

Part 2: Common Reasons for Exchange Database Mounting Failure

In most cases, we can have the following reasons for causing mounting failure or issues with an Exchange database:

  • The EDB file you are trying to load could be corrupted or unavailable.
  • If the essential transaction logs that are needed for mounting are missing or damaged.
  • In case the Exchange database has been corrupted by any malware or malicious entity.
  • The Exchange database has undergone a dirty shutdown.
  • A security issue with the database or its authentication check is failed.
  • Any other possible reason leading to the Exchange database’s corruption or unavailability.

Part 3: How to Fix the Exchange Database Not Mounting Issues?

As you can see, there can be so many reasons for causing the Exchange database not mounting errors. To fix it, you can manually mount the database again or simply repair it using any reliable application.

Fix 1: Mount the Database via Exchange Server

In case you have failed to mount the database on Exchange 2016/2013/2010, then you can simply try to do it manually. To do that, you just need to make sure that you have the administrative right on the Exchange database.

To mount any mailbox, just go to the Exchange database, log in to your account, and visit the “Severs” section. From here, you can just select the database of your choice, click on the three-dot icon from the top, and select the “Mount” option.

Mount Exchange Database

If your database has good health, then this action would let you mount or dismount it easily.

Fix 2: Use the ESEUTIL Command Utility

ESEUTIL is the Exchange Extensible Storage Engine Utility command that is used to perform a soft or hard repair of the database. Though, the command utility has a certain parameter (mh) that can present the state of your database. Once you know if the database went through a clean or a dirty shutdown, you can readily fix the issue.

To learn how to fix the Exchange database not mounting error with the ESEUTIL command, follow these steps:

Step 1: Get details about your Exchange database

At first, you can just launch the Command Prompt as an administrator and enter the “Get-MailboxDatabase” command. This will simply let you obtain details about the name, path, and state of your Exchange database.

Get Exchange Database Health

Step 2: Diagnose the health of your database

After checking the name and the path of the database, you can enter the “ESEUTIL /mh” command to diagnose its health. Please note that the “ESEUTIL /mh” command is followed by the pathname of the database.

Check Exchange Database Shutdown

Step 3: Fix your Exchange Database

Now when you know the issue with your Exchange server, you can easily fix it. To do that, you can enter either the “Eseutil/r” or the “Eseutil/p” command to perform a soft or hard repair of your database.

Repair Exchange Database with Utility Command

You have to enter the pathname (location) of your EDB files after the command to repair your database. Once the repairing process is completed, you can try to mount your Exchange database again

Fix 3: Use an Exchange Repairing Tool to Fix All Issues

If you are looking for a simpler and more effective solution to fix your Exchange database, then try Stellar Repair for Exchange. It is known to yield positive results in all kinds of scenarios caused by a dirty shutdown, corrupt log files, and other issues with EDB files.

.You can simply load any corrupt EDB file to the application and scan it to fix numerous issues with it. Here’s how you can fix the Exchange database not mounting error with Stellar Repair:

Step 1: Load the Corrupt EDB File

To start with, you can just launch Stellar Repair for Exchange and go to the “Select EDB File” option from the toolbar. This will let you browse the corrupt EDB file and load it on the application.

Stellar Repair for Exchange Load EDB

Step 2: Start Repairing the Corrupt EDB File

After loading the EDB file on Stellar Repair for Exchange, you can check its details, and click on the “Next” button.

Stellar Repair for Exchange Start Repairing

Subsequently, you can simply select a repairing mode (between Quick and Extensive). If you want, you can first perform a Quick Repair (to fix minor issues) and can later give its Extensive Repair a try to resolve severe issues with the database.

Stellar Repair for Exchange Select Mode

Step 3: Preview Results and Export your EDB File

Now, you can just wait for a while and let the application repair your Exchange database. After completing the repairing process, it will let you preview the results on its native interface.

Stellar Repair for Exchange Preview Data

If you are satisfied with the results, then you can click on the “Save” button from the toolbar. This will let you export your Exchange database in formats like EDB, PST, EML, etc. in any location of your choice

Stellar Repair for Exchange Export Data

As you can see, learning how to fix the Exchange database not mounting issue can be quite easy. At first, you need to diagnose the issue with your Exchange database to check what could have caused this problem. Subsequently, you can try the inbuilt command utility of Exchange or use a dedicated repairing tool (like Stellar Repair for Exchange) to fix all kinds of issues with your EDB files.