Can't run In-Place eDiscovery search for Exchange Online mailbox in Exchange Server 2019 or 2016 by using EAC
Office 365 ProPlus is being renamed to Microsoft 365 Apps for enterprise. For more information about this change, read this blog post.
In a Microsoft Exchange hybrid deployment environment, when you try to run In-Place eDiscovery searches in Microsoft Exchange Server 2019 or 2016 for cloud-based mailboxes by using Exchange admin center (EAC) in the on-premises server, you receive the following error message, depending on the scenario:
You are trying to search a remote mailbox that does not have an online archive enabled. In this scenario, you receive an error message that resembles the following:
Export failed with error type: 'FailedToSearchMailboxes'. Details: The underlying connection was closed: An unexpected error occurred on a receive. Endpoint: https://mail.contoso.com:444/EWS/Exchange.asmx
You are trying to search a remote mailbox that has an online archive enabled. The estimate of search results succeeds. However, when you try to copy the results to a discovery mailbox, the attempt fails and returns an error message that resembles the following:
Failed Search or Export, Mailbox:UserOne@contoso.com::Item:::DocumentId:::ItemId: with error: [FailedToGetRootFolders] Export failed with error type: 'FailedToGetRootFolders'. Message: ErrorNonExistentMailbox : No mailbox with such guid. Endpoint: https://mail.contoso.com:444/EWS/Exchange.asmx
This is a known issue in Exchange Server 2019 and 2016. To work around this issue, use either of the following methods:
Use the Office 365 Security & Compliance Center to run the In-Place eDiscovery search for the Exchange Online mailboxes.
If you still have a server that is running Microsoft Exchange Server 2013 that is installed in your on-premises organization, move the discovery mailbox to the Exchange Server 2013 server, and then try the search again.