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This cumulative update package for Microsoft BizTalk Server 2020 contains hotfixes for the BizTalk Server 2020 issues that were fixed after the release of BizTalk Server 2020.

We recommend that you test hotfixes before you deploy them in a production environment. Because the builds are cumulative, each new update release contains all the hotfixes and all the security updates that were included in the previous BizTalk Server 2020 update release. We recommend that you consider applying the most recent BizTalk Server 2020 update release.

Important information about the cumulative update package

Each cumulative hotfix package includes all the component packages. However, a cumulative update package updates only those components that are installed on the system.

Note For more information about the latest service pack or cumulative update package for BizTalk Server, see the following article in the Microsoft Knowledge Base:

2555976 Service Pack and cumulative update list for BizTalk Server

Note If you use the MQSeries adapter, MQSAgent.dll must be updated on the IBM WebSphere MQ server to the same cumulative update level that's on BizTalk Server. To do this, make sure that you run the same cumulative update setup on the IBM WebSphere MQ server. You may experience performance issues if you run mismatched versions.

This cumulative update package is a rollup update that contains the following items:

  • All new hotfixes that were released for BizTalk Server 2020

  • Other fixes that improve the product

Hotfixes that are included in Cumulative Update Package 5 for BizTalk Server 2020

The Microsoft Knowledge Base articles that discuss these hotfixes are published as the hotfixes become available. For more information about the BizTalk Server issues, see the following articles in the Microsoft Knowledge Base. 

BizTalk Server Adapter

KB article number



Improvement: Upgrade the WinSCP version used in the SFTP adapter to support updated SSH public key algorithms


FIX: WCF-SAP adapter ignores data segments of IDOCs that are received from MBCS SAP systems


FIX: WCF-SAP adapter might not have access to the saprfc.ini file if the RFC_INI environment variable isn't set


FIX: Event Hub adapter send ports might lose messages during heavy traffic loads without errors returned


FIX: Office 365 Outlook Email adapter might not fetch all emails if post actions are enabled


FIX: WCF-SAP adapter errors aren't logged in the Application event log when the received IDOCs can't be submitted to BizTalk Server


FIX: WCF-Oracle adapter fails with NotSupportedException when an Oracle PL/SQL package returns complex objects


FIX: "Timeout" error and SB-Messaging adapter might not resume receiving messages after temporary loss of network connectivity


FIX: Credentials might get swapped between connections if multiple WCF-SAP adapter connections have different SNC external identifications


FIX: "Message is suspended" error and SFTP send port is suspended if AppendIfExists is True and file doesn't already exist at destination


FIX: SFTP adapter might raise unnecessary warnings if the receive location is configured as read-only

BizTalk Server Administration Tools and Management APIs

KB article number



FIX: The UpdateDatabase.vbs script doesn't update the DTA entries specific to AS2 and EDI


FIX: WMI MSBTS_HostInstance.Install method returns a credential error if the IsGmsaAccount parameter isn't provided


FIX: HTTP Error 500 when using the BizTalk Server REST APIs for host instances

Updated External Dependencies


Updated version












How to get Cumulative Update Package 5 for BizTalk Server

BizTalk Server uses a cumulative update (CU) model for providing fixes and updates. Each CU includes new updates in addition to all the updates that were included in previous CUs. We recommend that you test and then apply the latest CU to all BizTalk environments.

All new fixes are publicly released in the upcoming CU. Standalone fixes might be provided before the next CU if the reported problem is very important, has a significant business effect, and doesn't have a workaround. If standalone fixes are provided, they require that the latest released CU be installed.

Download Center

The following file is available for download from the Microsoft Download Center:

Download Download Cumulative Update 5 for BizTalk Server 2020 now

Release date: December 5, 2023

For BizTalk Developer Tools

If you have BizTalk Developer Tools installed, you must install the latest version of BizTalk Server Visual Studio extension (build in addition to this CU package. The extension can be installed from or from within Visual Studio through Manage Extensions.

For more information about how to download Microsoft support files, see how to obtain Microsoft support files from online services.

Microsoft scanned this file for viruses by using the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to it.


For more information about BizTalk Server hotfixes, see Information about BizTalk Server hotfixes.

Learn about the standard terminology that's used to describe Microsoft software updates.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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