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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.

Known issues in this cumulative update

  • 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 execute the /PrepareAD command during the first server installation. Installation will finish only if the user who initiated SETUP has the appropriate permissions.

  • The Set-SendConnector cmdlet does not work for Exchange Server 2019 in hybrid scenarios that have a Edge server installed. For more information, see KB 4523519.

Issues that this cumulative update fixes

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

  • 4502134 Can't get all the emails when searching mailbox by using an end date that's different from today in Exchange Server 2019

  • 4502135 Correct the error message that you receive when installing Exchange Server 2019 in an organization that has Exchange Server 2010 installed

  • 4502154 Providing information to administrators when auto forward limit is reached in Exchange Server 2019 and 2016

  • 4502155 "The primary SMTP address must be specified when referencing a mailbox" error when you use impersonation in Exchange Server 2019 and 2016

  • 4502156 Audit logs aren’t updated when "-WhatIf" is used as $false in the command in Exchange Server 2019 and 2016

  • 4502157 The Find command not returning the HasAttachments element in Exchange Server 2019 and 2016

  • 4502158 SyncFolderItems contains duplicated ReadFlagChange items in Exchange Server 2019 and 2016

  • 4502131 "TLS negotiation failed with error UnknownCredentials" error after you update TLSCertificateName on Office 365 send connector in Exchange Server 2019 hybrid environment

  • 4502132 Can't reply to old emails after migration even though old legacyExchangeDN is set to migrated mailbox in Exchange Server 2019 and 2016

  • 4502136 The response of FETCH (BODYSTRUCTURE) command of IMAP violates RFC 3501 in Exchange Server 2019 and 2016

  • 4502140 Can't preview an eDiscovery search when there are multiple domains in Exchange Server 2019 and 2016

  • 4502141 Appointment that’s created by responding to an email message doesn’t show in any Outlook calendar views in Exchange Server 2019 and Exchange Server 2016

  • 4502133 Can't use Outlook on the web to reply a partner email through mutual TLS in Exchange Server 2019 and 2016

  • 4488396 Can't search any results in manually added shared mailbox in Outlook in Exchange Server 2019 and 2016

  • 4488078 Public folder contact lists don't show contact's profile picture in Outlook on the web in Exchange Server 2019 and 2016

  • 4499503 Heavy organizational forms traffic because of materialized restriction when organization forms library has more than 500 items in Exchange Server 2019 and 2016

  • 4503027 Description of the security update for Microsoft Exchange Server 2019 and 2016: June 11, 2019

Get Cumulative Update 2 for Exchange Server 2019

Volume Licensing Center

To get Cumulative Update 2 for Exchange Server 2019, go to Microsoft Volume Licensing Center.

Note The Cumulative Update 2 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 2.

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