Exchange Mailbox Restore with Kroll Ontrack (Kroll Restore)



This article describes the procedure to restore Exchange mailboxes by using Kroll Ontrack PowerControls for Exchange.

To restore a SQL server, see Granular SQL Restore With Ontrack PowerControls.


  • Datto SIRIS
  • Datto ALTO
  • Kroll Ontrack PowerControls for Exchange Version 9.0


1. Prerequisites

If you are restoring from an ALTO 3, proceed to Section 2: Licensing Information. If you are restoring from any other ALTO appliance that is not on per-agent pricing, see Exchange Mailbox Restore With Kroll Ontrack For ALTO (Kroll Restore) to get started.

2. Licensing Information

The Kroll Ontrack PowerControls for Exchange licenses bundled in the Datto SIRIS are for Exchange Databases for 500 users or less.

Kroll licenses expire after a set period. If the license on your device shows expired, you'll need to provision one from the same location. There is no additional charge for this license on SIRIS devices; it is provided by Datto.

ALTO users not on per-agent pricing must purchase this service at an additional cost. Contact your Sales Executive, or navigate to the Purchasing & Billing → Service Billing category on the Datto Partner Portal, if you need to purchase a Kroll license for an ALTO appliance.

If your Exchange Database contains more than 500 users, contact Datto Technical Support to start a recovery. If time is a critical factor, ask your Support technician how long the recovery may take; large databases can take several hours or more to process, depending on their size. Be sure to note the amount of mailboxes you need, as shown in the figure below.

Figure 1: Mailbox Limit Reached

To perform Exchange restores, Datto appliances use Kroll Ontrack PowerControls version 9.0. Other versions of this software are unsupported.

3. System Requirements

3.1 Software

Supported Operating Systems:

    • Windows Server 2008
    • Windows Server 2008 R2
    • Windows Server 2012
    • Windows Server 2012 R2
    • Windows 7
    • Windows 8
32-bit and 64-bit versions of the above-listed operating systems are supported. Operating systems must have the latest service packs installed.

Supported Source Microsoft Exchange Database (offline):

The following versions of Microsoft Exchange Server are supported as offline source databases:

  • Microsoft Exchange Server 2000
  • Microsoft Exchange Server 2003
  • Microsoft Exchange Server 2007
  • Microsoft Exchange Server 2007 through SP3
  • Microsoft Exchange Server 2010 through SP3
  • Microsoft Exchange Server 2013 through SP1
  • Microsoft Exchange Server 2016

Supported Target (live) Microsoft Exchange Server:

The following versions of Microsoft Exchange Server are supported as live targets:

  • Microsoft Exchange Server 2007 through SP3
  • Microsoft Exchange Server 2010 through SP3
  • Microsoft Exchange Server 2013 through SP1
  • Microsoft Exchange Server 2016

Microsoft Office (Microsoft Outlook)

  • Microsoft Office Outlook 2007 and later (32-bit versions only).

Tip: If installing Outlook in a disaster recovery situation, just install Outlook without configuring an email, as this will suffice for this requirement. 

Note: Office 365 is not supported with Kroll Ontrack version 7.2. Only on-premise is supported for this version. Office 365 support started with version 7.3.

3.2. Hardware

  • Intel Pentium-compatible processor
  • 1024 MB RAM minimum
  • 200 MB of free hard disk space for the installation of Ontrack PowerControls
  • Monitor with 800 x 600 or higher screen resolution

4. Performing the Restore

Offsite Restore Preparation

If you need to perform a Kroll restore from an offsite recovery point, follow the steps in Mounting a Secure FTP File Restore in the Recovery Launchpad to create the cloud share. You can then use Netdrive to mount the SFTP share to a local environment with the required software installed. Installation of Netdrive is described here. Alternatively, download the needed EDB file to your local environment, and instead of performing Step 7, use the path to the EDB file's download location. If the file is too large to download, consider a Reverse Roundtrip.

When you have completed these steps, proceed to step 4.1 of this article.

Do not leave offsite file restores mounted for any longer than necessary. Leaving restores mounted when they are not in use can affect your offsite retention usage, and may result in overage charges. 

4.1. Configuring Microsoft Office Outlook

      • Make sure that Office Outlook is been installed, and that it has been run once.
      • Set up an email account on an Exchange Server.
      • For versions of Outlook that distinguish between Corporate Email, use Corporate Email when configuring Outlook.
      • Run Outlook again, and connect to the Exchange Server.

4.2. Obtaining the Kroll License

Click on the Advanced tab, and select the Granular Restore tab of the Datto web interface. 

Figure 2: Download & License Provisioning

This option will not appear in the Device UI on ALTO 2 continuity devices. Contact Datto Technical Support for assistance with performing a mailbox restore on an ALTO 2.

4.3. Kroll Licensing for Previously-Installed Instances

If you are following this procedure for a previously installed version, be sure to download the license.ini file into the folder in which Kroll had been previously installed. The default path for Kroll installations is: C:\Program Files (x86)\Kroll Ontrack\Ontrack PowerControls\. Then, proceed to step 7. Otherwise, proceed to step 5.

5. Install Ontrack PowerControls

1. Install and configure Outlook as described in Configuring Microsoft Office Outlook.
2. Turn off any disk utility or antivirus program running in the background.
3. Download and run the installer from the Datto appliance's Advanced  → Granular Restore tab.
4. Select Install Ontrack Power Controls to start the installation process.

Figure 3: Install Ontrack PowerControls

5. You may be prompted to install additional required components before you can install the software, as shown in Figure 4. Select OK to install them.

Figure 4: Additional components required

6. Click Next to begin the installation.

Figure 5: InstallShield Wizard for Ontrack PowerControls

7. Once the installation completes, proceed to the next section of this article.

6. Install the License File

1. Launch Ontrack PowerControls for Exchange. You will see the prompt shown in Figure 6. Click Apply License.

Figure 6: InstallShield Wizard for Ontrack PowerControls

2. In the License Information window, click the navigation button highlighted in Figure 7. Browse to the license.ini file you downloaded from your Datto appliance or received from your Datto Sales Executive. Then, click Close.

Figure 7: Browse button

7. Performing Exchange Message Level or Mailbox Level Restoration

Mount a Recovery Point in the Datto Appliance GUI

1. On your Datto appliance, perform a Local File Restore of the recovery point you'd like to restore from. Make note of the Samba Share path of the restore.

Figure 8: Samba Share path

8. Configuring the Kroll Ontrack Data Wizard

1. Launch Ontrack PowerControls for Exchange. You will see the Data Wizard shown in Figure 9. If the Data Wizard does not appear automatically, you can launch it by clicking File  → Use Wizard in the Ontrack PowerControls for Exchange UI.

2. Paste the Samba Share path of your file restore into the EDB Path field of the Data Wizard, and click Browse.

Figure 9: Data Wizard

3. Navigate through the directory tree of your file restore and locate the EDB file you would like to restore from. Select the EDB file, and click Open.

Figure 10: EDB file selection

4. In the Data Wizard, the EDB PathLog File Path, and Temporary File Path fields will auto-populate. Click Next to continue.

Figure 11: Data Wizard with required path information


5. Select the Target Type you would like to restore the contents of the EDB back to (Figure 12.1), and then use the Browse button to select the Target (Figure 12.2). When you finish making your selections, click Next to continue.

Figure 12: Target selection

6. The Data Wizard will display the message "Now Processing Data File," as it processes the EDB file. The processing takes place in three stages:

  1. Pre-scanning the log files (integrity check)
  2. Scanning the log files (playing the log files)
  3. Hashing the EDB file (building a folder hierarchy)
If Ontrack PowerControls encounters bad or missing log files during log playing, you will be given the option to continue without playing the logs. If you choose to continue, Ontrack PowerControls will processe the EDB without logs.

7. The Data Wizard will close. You will see the results of your recovery displayed in the Source and Target panes in the main Ontrack PowerControls window.

8. For advanced information about working with or managing your recovery, or for information about recovering from non-EDB sources, see the Ontrack PowerControls User Guide (PDF).

To prevent conflicts with retention operations on your Datto appliance, remember to remove the Local File Restore you used for the Exchange mailbox restore when you are done performing the mailbox recovery.

Figure 13: Main window, displaying EDB source and PST target

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