How to Solve “Exchange-Level Logical Consistency Can No Longer Be Guaranteed” Error?

While working on Microsoft Exchange Server sometimes user are unable to work with the Exchange mailboxes because it of this error “Exchange-level logical consistency can no longer be guaranteed”. If you are one of the person who is finding difficult to troubleshoot this issue then don’t worry, this write-up will guide you and provide the solution to fix the error.

Before proceeding towards the solution to solve the error let use know more about it. The MS Exchange Server & mailbox database plays a very important role in IT organization & other industry verticals and it is important to keep its data safe and secure from various threats, corruption, disaster, etc…

Besides this, there are chances of Exchange database file to be corrupted. When the mailbox database is damaged / unhealthy / corrupted it is obvious that users cannot access the user mailboxes & sometime it leads to data loss from the database.

Also, when users try to access or work with the corrupted Exchange database mailboxes, you will receive many error such as: Operation terminated with error 528 current log file missing, Exchange-level logical consistency can no longer be guaranteed and many more.

Well these two error are related to each other.

Operation Terminated With Error 528 Current Log File Missing

When the data of Exchange database becomes inaccessible, the administrator first operation is to restore the database on the Exchange backup files. In this time period, due to sudden power outage, fluctuations, or Exchange database corruption, the recent log files goes missing.

There is no doubt that everyone know there are two logs file i.e. Main and temporary. In temp log file the recent activity or transaction are stored and after completion they save in the main log file. When the temporary log file is missing, it cause inconsistency in the main log file because the transaction are already performed but not saved.

Reason Behind Exchange-Level Logical Consistency Can No Longer Be Guaranteed Error

1. Power Outage & Fluctuations – The temporary log file can be easily erased from the system when sudden power outage or fluctuation occurs.
2. Exchange mailbox database corruption – When EDB file is corrupted because of dirty shutdown then the log file get lost without giving prior notice.
3. Antivirus program Configuration – Due to wrong configuration of antivirus program cause error. When quarantine app of antivirus isn’t enable, then the Exchange server suppose that all the log file are threat to it because of which it deleted all the files.

When users try to restore the mailbox database and the recent log file is missing then this leads to the error – operation terminated with error 528 current log file missing.

Solution to Troubleshoot this Error

There are two possible way to solve or fix this error:

1) Users can use the built-in ESEUTIL utility to solve the error. But this tool has many limitation given below due to which it hinder in the recovery of your Exchange database.

1. Users have to face data loss
2. Time taking process to recover MS Exchange database
3. Requires enough storage space to launch the ESEUTIL tool

2) The second option is to deleted all log files & remove all checkpoints too. When user permanently deleted the log files, then they can restore it backup from the latest backup file. This will fix the problem.

If the solution doesn’t solve the error and users tries to restore the data from Exchange database then they will get another error:

“Database has been offline-repaired (by eseutil.exe) one or more times in the past. However, although this ensures database-level logical consistency and may permit the database to be successfully mounted, Exchange-level logical consistency can no longer be guaranteed. Therefore, all mailboxes should be evacuated from the database and the database should be retired as soon as possible in order to eliminate the potential for unexpected behaviour caused by Exchange-level logical inconsistency.”

Solution to Fix the “Exchange-level logical consistency can no longer be guaranteed” Error

You can use the Exchange PowerShell New-MoveRequest Command to move the mailboxes from one database to another. But the problem arise when your mailbox database contains any corrupt items and to fix this issue users can use the “Baditemlimit” & “AcceptDataLossParameter” parameter or you can also export the .edb file mailbox to the Outlook database file via New-MailboxExportRequest cmdlet.

While exporting users have to also see the size of the mailbox because the PST file size limit is 50 GB. If the data in the mailbox is more then that this would create problem for the users. Also, it requires technical knowledge, skills and hands-on experience to handle the Exchange PowerShell and if user are new to this environment then you will face a lot of trouble.

Note: To avoid all this complexity users can use the third-party software provided by SysTools i.e. Exchange Server Recovery Software which easily export any size of offline/dismounted Exchange database file to PST file in a simplified manner.

Use Automated Solution

Exchange Server Recovery Software easily export large size offline EDB file to PST file formats. This utility provides “Split PST” advance option which automatically breaks the Outlook data file in MB or GB as per users requirements. Users can bulk export mailbox to PST Exchange 2010/2013/2016 without using any command in a hassle-freeway. It provides graphical interface which allow users to do their task easily and save their time and effort too.

Technical and non-technical users can use this utility. It provides dual scanning mode which resolves database corruption Exchange 2010/2013/2016 and recovers Exchange database file. The quick scan is used to recover minimal corruption and if the .edb file is severely corrupted then select the advance scan. This option easily recovers and repair EDB file as well as mailboxes with no data loss.

The software easily extract mailbox from EDB file Exchange 2016/2013 and export it directly to the Live Exchange Server mailboxes, Office 365 and multiple file formats. It auto-generates the export report which contains the success and fail count of exported Exchange mailbox data.

Key Features Of Automated Software

1. Support pub.edb and priv.edb & STM file
2. Preview Microsoft mailbox items before conversion
3. Preserve actual folder structure and keep metadata intact
4. Repair Exchange mailbox & EDB file via scan mode option
5. Remove email encryption (SMIME/OpenPGP) from Exchange database mailboxes
6. Migrate offline EDB to Office 365, various file formats and Live Exchange Server
7. Export selective data items by using categories filter option
8. Compatible with all Outlook, Exchange Server, and Windows OS versions

Bringing It All Together

This write-up provides the detailed information on how to solve the error “Exchange-level logical consistency can no longer be guaranteed”. Users can use the manual solution to fix the issue but in case the ESEUTIL tool or the PowerSehll command doesn’t work that users can go for the advanced solution mentioned in the above section that easily remove corruption from offline/dismounted Exchange database file with no data loss and export the healthy and recovered mailboxes to the Exchange Server, O365 and PST, MBOX, PDF, HTML, MSG, EML file formats in a simple way.