How to fix Exchange Error 1056749110?

Among the many tasks an Exchange administrator has to perform, restoring, moving or migrating Exchange mailboxes on the server is a major one. Though most of it involves a typical set of scripts that need to be run with minor tweaks, sometimes, the process gets interrupted or worse, fails due to unforeseen reasons. 

In this article, we're discussing one such instance in which, mailbox move / restore operation on the Exchange server fails with an error code 1056749110. If you've worked with Exchange long enough, it's unlikely you haven't faced this error at least once. Let's dissect this error and find out all that we can about it.

Steps for recovering Individual Mailbox items

There are several techniques to recover individual mailbox items for an Exchange server mailbox. Typically, using Windows Server Backup, this process includes the following stages:

Usually, all these stages progress without any flaws if all specified parameters are correct. However, for some mailboxes, restoring / moving the contents could fail with error code 1056749110.

What is Exchange Error 1056749110??

If the mailbox move / restore operation fails with error 1056749110, you'll face the following error message:

Restore-Mailbox: Error was found for RSG, Test because: Error occurred in the step: Moving messages. This mailbox exceeded the maximum number of corrupted items specified for this move mailbox operation, error code: -1056749110

This error occurs because of the presence of corrupt items in the mailbox. While the restore / move operation is underway, if corrupt items are found in the mailbox, the execution retries to complete the operation several items. However, it gives up after a certain limits of retrial attempts and throws this error.

How to Fix the Exchange Error 1056749110?

You can try to fix Exchange error 1056749110 through two methods:

Let's skin through these one by one.

Manual method

To solve this error manually, we'll try to restore a sample mailbox (that has corrupted items) from RSG to a production mailbox. Here is the command to do this:

Restore-Mailbox -RSGMailbox "RSG, Test" -RSGDatabase MySmpl-Exch\RSG_DB\db11 -id "Recovery, Mailbox" -TargetFolder "Recovered Mails of RSG mailbox"

Here is a description of the various parameters in this command:

Since we have purposely picked a mailbox that has corrupted items, this command is expected to fail with the error 1056749110. In order to stop this command from failing, add the BadItemLimit switch to the command as follows:

Restore-Mailbox -RSGMailbox "RSG, Test" -RSGDatabase MySmpl-Exch \RSG_DB\db11 -id "Recovery, Mailbox" -TargetFolder "Recovered Mails of RSG mailbox" –BadItemLimit 1000

The BadItemLimit switch tells the command to skip bad or corrupted items in the mailbox. The number following the switch is the total number of items to be skipped. The valid input range for this switch is 0 to 2,147,483,647 (where giving input as 0 is the same as not specifying the parameter at all).

Using third-party automated tool

Though the above mentioned method works for most cases, it might not achieve its purpose in rare cases. At such times, you can use competent third-party EDB repair software Stellar Repair for Exchange. This product is adept in repairing corrupt or damaged EDB (Exchange Database) files to restore inaccessible mailbox items. Using this tool will give you two major advantages over the manual method:

Concluding Lines

So, there you go! The next time your Exchange mailbox move/restore operation fails due to corruption, you know exactly what to do and how. And don't forget to make the process easy by using automated software.