KB5007192

After installing this update, Windows print clients might encounter the following errors when connecting to a remote printer shared on a Windows print server:

• 0x000006e4 (RPC_S_CANNOT_SUPPORT)

• 0x0000007c (ERROR_INVALID_LEVEL)

• 0x00000709 (ERROR_INVALID_PRINTER_NAME)

Note The printer connection issues described in this issue are specific to print servers and are not commonly observed in devices designed for home use. Printing environments affected by this issue are more commonly found in enterprises and organizations.

This issue is resolved in KB5008207.

After installing the November security updates, released November 9, 2021 on your Domain Controllers (DC) that are running a version of Windows Server, you might have authentication failures on servers relating to Kerberos Tickets acquired via S4u2self. The authentication failures are a result of Kerberos Tickets acquired via S4u2self and used as evidence tickets for protocol transition to delegate to backend services which fail signature validation. Kerberos authentication will fail on Kerberos delegation scenarios that rely on the front-end service to retrieve a Kerberos ticket on behalf of a user to access a backend service. Important Kerberos delegation scenarios where a Kerberos client provides the front-end service with an evidence ticket are not impacted. Pure Azure Active Directory environments are not impacted by this issue. 

End users in your environment might be unable to sign into services or applications using Single Sign On (SSO) using Active Directory on-premises or in a hybrid Azure Active Directory environment. Updates installed on the client Windows devices will not cause or affect this issue.

Affected environments might be using the following:

• Azure Active Directory (AAD) Application Proxy Integrated Windows Authentication (IWA) using Kerberos Constrained Delegation (KCD)

• Web Application Proxy (WAP) Integrated Windows Authentication (IWA) Single Sign On (SSO)

• Active Directory Federated Services (ADFS)

• Microsoft SQL Server

• Internet Information Services (IIS) using Integrated Windows Authentication (IWA)

• Intermediate devices including Load Balancers performing delegated authentication

You might receive one or more of the following errors when encountering this issue:

• Event Viewer might show Microsoft-Windows-Kerberos-Key-Distribution-Center event 18 logged in the System event log

• Error 0x8009030c with text Web Application Proxy encountered an unexpected is logged in the Azure AD Application Proxy event log in Microsoft-AAD Application Proxy Connector event 12027

• Network traces contain the following signature similar to the following:

  • 7281 24:44 (644) 10.11.2.12 <app server hostname>.contoso.com KerberosV5 KerberosV5:TGS Request Realm: CONTOSO.COM Sname: http/xxxxx-xxx.contoso.com

  • 7282 7290 (0) <hostname>. CONTOSO.COM <IP address of the application server making the TGS request>

This issue is resolved in KB5008601.

After installing this update, Microsoft Installer (MSI) might have issues repairing or updating apps. Apps that are known to be affected include some apps from Kaspersky. Affected apps might fail to open after an update or repair has been attempted.

This issue is resolved in KB5008207.

After installing updates released April 22, 2021 or later, an issue occurs that affects versions of Windows Server that are in use as a Key Management Services (KMS) host. Client devices running Windows 10 Enterprise LTSC 2019 and Windows 10 Enterprise LTSC 2016 might fail to activate. This issue only occurs when using a new Customer Support Volume License Key (CSVLK). 

Note This does not affect activation of any other version or edition of Windows. 

Client devices that are attempting to activate and are affected by this issue might receive the error, "Error: 0xC004F074. The Software Licensing Service reported that the computer could not be activated. No Key Management Service (KMS) could be contacted. Please see the Application Event Log for additional information."

Event Log entries related to activation are another way to tell that you might be affected by this issue. Open Event Viewer on the client device that failed activation and go to Windows Logs > Application. If you see only event ID 12288 without a corresponding event ID 12289, this means one of the following:

• The KMS client could not reach the KMS host.

• The KMS host did not respond.

• The client did not receive the response.

For more information on these event IDs, see Useful KMS client events - Event ID 12288 and Event ID 12289.

This issue is resolved in KB5010359.