The eDiscovery or electronic discovery feature (In-place eDiscovery) in Exchange Server and Office 365 facilitates you to search information in the user mailboxes, Microsoft Teams, Office 365 Groups, SharePoint, Skype, and OneDrive for Business for legal and forensic requirements.
In-place eDiscovery can be accessed from the Security and Compliance Center in Exchange admin center (EAC), where you can create a search and later export the search results for further analysis. But sometimes, in Exchange 2013, the eDiscovery feature fails to perform a search, and then it gives an error message:
Failed Search or Export, Mailbox:/o=techtarget/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=user::Item:::DocumentId:::ItemId: with error: [FailedToSearchMailboxes] Class ExtendedAttribute is only valid for Exchange version 1941996250 or later.
Or the error may be:
The search server can't find an object to execute the search. Please contact your administrator for assistance. The message from the search server is "the active directory user wasn't found, <.'
Another error of this type is:
The Active Directory user wasn't found, /o=GM/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=9ca72100e77c493e96893e9bebf361b2-WZ46K6.
There are various reasons behind these error messages, and some of them are the following:
Based on the possible reasons, you can follow multiple methods like the following:
Method 1: Install the latest Cumulative Updates for Exchange 2013. You can get the details about the updates, and also download them from https://docs.microsoft.com/en-us/exchange/updates-for-exchange-2013-exchange-2013-help
Method 2 - Install the latest version of .Net on the local computer and then perform the eDiscovery search.
Method 3 - If the settings of the local Intranet Zone is not done correctly, then use the upcoming steps:
Method 4- Use Internet Explorer as it is supported by all Microsoft platforms.
After you have rectified the error, you can further make a, eDiscovery search query and get the desired content. Here are the following cases which you can create using the eDiscovery feature;
In-place eDiscovery features used to search and export mailbox data to a safe location. However, when there is a need for comprehensive backup of Exchange/Office 365 data, this feature may not be of that much help. That’s why you should use a professional tool like Kernel Exchange Backup & Restore to backup Exchange and Office 365 mailbox to a PST file.
Kernel Exchange Backup & Restore is a straightforward migration tool to take Exchange Server Backup and allows you to select the essential data to save in a PST format at the desired folder. It provides you also a concise migration report in a CSV format showing the status of each message. The benefit is using this tool is that you can run multiple backups at the same time, and each migration runs efficiently.