Cumulative Update 7 for Exchange Server 2019

Cumulative Update 7 for Microsoft Exchange Server 2019 was released on September 15, 2020. This cumulative update is a security update. It includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These fixes will also be included in later cumulative updates for Exchange Server 2019. This update also resolves a vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2020-16875.

This update also includes new daylight saving time (DST) updates for Exchange Server 2019. For more information about DST, see Daylight Saving Time Help and Support Center.

• In multidomain Active Directory forests in which Exchange is installed or has been prepared previously by using the /PrepareDomain option in Setup, this action must be completed after the /PrepareAD command for this cumulative update has been completed and the changes are replicated to all domains. Setup will try to run the /PrepareAD command during the first server installation. Installation will finish only if the user who initiated Setup has the appropriate permissions.
  • About the /PrepareDomain operation in multidomain:
    
    The /PrepareDomain operation automatically runs in the Active Directory domain in which the /PrepareAD command is run. However, it may be unable to update other domains in the forest. Therefore, a domain administrator should run the /PrepareDomain in other domains in the forest.
  • About the permission question:
    
    As the /PrepareAD is triggered in Setup, if the user who initiates Setup isn't a member of Schema Admins and Enterprise Admins, the readiness check will fail and you receive the following error messages.
    
    
    
    To avoid the errors, either the user should join Schema Admins and Enterprise Admins groups or another user in Schema Admins and Enterprise Admins groups manually runs the /PrepareAD for this Cumulative Update first. Then, the Exchange admin user can start Setup.
• Autodiscover Event ID 1 occurs after you install Cumulative Update 3 for Exchange Server 2019. For more information, see KB 4532190.
• Starting from Exchange Server 2019 CU6, in some cases you might see the string "&nbsp" in the body of an item that has been moved between folders or mailboxes using Outlook in Online Mode.

This cumulative update also fixes the issues that are described in the following Microsoft Knowledge Base articles:

• 4570248 Get-CASMailbox uses wrong LDAP filter for ECPEnabled in Exchange Server 2019
• 4576652 Updates for Exchange Server 2019 Sizing Calculator version 10.5
• 4570252 Intermittent poison messages due to NotInBagPropertyErrorException in Exchange Server 2019
• 4576649 System.InvalidCastException when you change passwords in Outlook on the web in Exchange Server 2019
• 4570251 Inbox rule applying a personal tag doesn't stamp RetentionDate in Exchange Server 2019
• 4570245 ESEUtil /p fails if any long value (LV) is corrupted in Exchange Server 2019
• 4570255 NullReferenceException occurs when running TestFederationTrust in Exchange Server 2019
• 4576650 Can't add remote mailbox when setting email forwarding in Exchange Server 2019 Hybrid environment
• 4570253 CompletedWithErrors without details for mailbox migration batches in Exchange Server 2019
• 4570247 CSV log of Discovery export fails to properly escape target path field in Exchange Server 2019
• 4570246 EdgeTransport crashes with Event ID 1000 (exception code 0xc00000fd) in Exchange Server 2019
• 4570254 MSExchangeMapiMailboxAppPool causes prolonged 100% CPU in Exchange Server 2019
• 4563416 Can't view Online user free/busy status in Exchange Server 2019
• 4576651 Can't join Teams meetings from Surface Hub devices after installing Exchange Server 2019 CU5
• 4577352 Description of the security update for Microsoft Exchange Server 2019 and 2016: September 8, 2020

Volume Licensing Center

To get Cumulative Update 7 for Exchange Server 2019, go to Microsoft Volume Licensing Center.

Note The Cumulative Update 7 package can be used to run a new installation of Exchange Server 2019 or to upgrade an existing Exchange Server 2019 installation to Cumulative Update 7.

Prerequisites

This cumulative update requires Microsoft .NET Framework 4.8.

A component that's used within Exchange Server requires a new Visual C++ component to be installed together with Exchange Server. This prerequisite can be downloaded at Visual C++ Redistributable Package for Visual Studio 2012.

For more information about the prerequisites to set up Exchange Server 2019, see Exchange 2019 prerequisites.

Restart requirement

You may have to restart the computer after you apply this cumulative update package.

Registry information

You don't have to make any changes to the registry after you apply this cumulative update package.

Removal information

After you install this cumulative update package, you can't uninstall the package to revert to an earlier version of Exchange Server 2019. If you uninstall this cumulative update package, Exchange Server 2019 is removed from the server.

File hash information

For more information about the deployment of Exchange Server 2019, see Release notes for Exchange 2019.

For more information about the coexistence of Exchange Server 2019 and earlier versions of Exchange Server in the same environment, see Exchange 2019 system requirements.

For more information about other Exchange updates, see Exchange Server Updates: Build numbers and release dates.

Learn about the terminology that Microsoft uses to describe software updates.