• Eric Marsi

Exchange Server 2019: CU1 has been Released


Microsoft released Cumulative Update 1 (CU1) for Exchange Server 2019 today and it brings a lot of fixes for various issues contained within the RTM release and patches the recent CVE-2019-0686 vulnerability. Microsoft explains many of these fixes in their recent blog post, but also warns that there are new known issues with this new cumulative update. This update is available for download now at the Microsoft Volume licensing Service Center (VLSC). Listed below is some of fixes that this cumulative update provides:

  • 4487596 Emails are blocked in moderator mailbox Outbox folder when you send large volumes of emails in Exchange Server 2019

  • 4487591 The recipient scope setting doesn't work for sibling domains when including OUs in the scope in Exchange Server 2019

  • 4487602 Outlook for Mac users can still expand a distribution group when hideDLMembership is set to true in Exchange Server 2019

  • 4488076 Outlook on the Web can't be loaded when users use an invalid Windows language in operating system in Exchange Server 2019

  • 4488079 Exchange Server 2016 allows adding Exchange Server 2019 mailbox server into a same DAG and vice versa

  • 4488263 X-MS-Exchange-Organization-BCC header isn't encoded correctly in Exchange Server 2019

  • 4488080 New-MigrationBatch doesn't honor RBAC management scope in Exchange Server 2019

  • 4488262 Delivery Reports exception when tracking a meeting request that's sent with a room resource in Exchange Server 2019

  • 4488268 Disable the irrelevant Query logs that're created in Exchange Server 2019

  • 4488267 Test-OAuthConnectivity always fails when Exchange Server uses proxy to connect to Internet in Exchange Server 2019

  • 4488266 Client application doesn't honor EwsAllowList in Exchange Server 2019

  • 4488265 "There are problems with the signature" error occurs for digital signature message if attachment filtering is enabled in Exchange Server 2019

  • 4488398 "The Microsoft Exchange Replication service may not be running on server" error when you add a mailbox database copy in Exchange Server 2019

  • 4488264 Mailbox that has a bad move request can't be cleaned up from destination mailbox database in Exchange Server 2019

  • 4488261 Event ID 1002 when the store worker process crashes in Exchange Server 2019

  • 4488260 New-MailboxExportRequest and New-MailboxImportRequest don't honor RBAC management scope in Exchange Server 2019

  • 4488259 MailTip shows wrong number of users for a distribution group if the users are in different domains in Exchange Server 2019

  • 4488258 OAuth authentication is removed when saving MAPI virtual directory settings in EAC in Exchange Server 2019

  • 4490060 Exchange Web Services Push Notifications can be used to gain unauthorized access

  • 4490059 Reducing permissions required to run Exchange Server using Shared Permissions Model

Sources:

Microsoft: https://support.microsoft.com/en-us/help/4471391/cumulative-update-1-for-exchange-server-2019

TechNet: https://blogs.technet.microsoft.com/exchange/2019/02/12/released-february-2019-quarterly-exchange-updates/

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© 2019 UCIT Blog by Eric Marsi