Impact: This issue affects enterprise users using FSLogix user profile containers on multi-session environments. Originating KB URL: https://support.microsoft.com/en-us/topic/5040525 Originating KB Release Date: 2024-07-23T14:00:00-07:00 Originating Build: 19045.4717 Resolved KB URL: https://support.microsoft.com/en-us/topic/5045594 Date Resolved: 2024-10-22T10:00:00-07:00 All Updates: ------------------------------------------------------ November 08, 2024 22:45 PM A small subset of Azure Virtual Desktop customers using multi-session hosts (AVD) who have installed Windows Updates released between KB5040525 (https://support.microsoft.com/help/5040525) on July 23, 2024, and KB5044273 (https://support.microsoft.com/help/5044273), released October 8, 2024, may experience the following issues: - An extended 10-to-30-minute-long hang at a black screen following user logon. - Office applications including Outlook and Teams experience single sign-on (SSO) (https://learn.microsoft.com/entra/identity/enterprise-apps/what-is-single-sign-on) failures, preventing users from connecting or synchronizing data. This issue is caused by a deadlock in the interactions between the Azure Active Directory(AAD) broker and the underlying AppX deployment service(AppxSvc) and Background tasks infrastructure service.You are more likely to experience this issue if you are using FSLogix (https://learn.microsoft.com/fslogix/overview-what-is-fslogix) user profile containers on multi-session environments. FSLogix is a Microsoft tool that helps manage and speed up user profiles on computers, especially in virtual environments like remote desktops. Windows 10 Education edition users and home users of Windows using Home or Pro editions are unlikely to face this issue as Azure Virtual Desktop is more commonly used in enterprise environments. Resolution: This issue is resolved by installing the Windows updates released October 22, 2024 (KB5045594 (https://support.microsoft.com/help/5045594)) or later updates and by applying one of the options mentioned in the Resolution section in KB5048864 (https://support.microsoft.com/topic/kb5048864-avd-users-might-experience-extended-time-on-a-black-screen-during-logon-and-sso-failures-7c1bbe77-ab9c-4c9e-80b8-6d6a9a5c8c20?preview=true). Note that you need to perform both actions to resolve the issue. Affected platforms: - Client: Windows 10, version 22H2 - Server: None Click here (https://admin.microsoft.com/Adminportal/Home?#/windowsreleasehealth/:/wrhpreferences) to manage email notifications for Windows known issues. ------------------------------------------------------ November 01, 2024 21:22 PM After installing the July 2024 non-security preview update (KB5040525 (https://support.microsoft.com/help/5040525)), released July 23, 2024, or subsequent updates, you might experience an extended black screen that stays between 10 to 30 mins when you login to Azure Virtual Desktop (https://learn.microsoft.com/azure/virtual-desktop/) (AVD). Additional symptoms you might experience include: - Failures related to single sign-on (https://learn.microsoft.com/entra/identity/enterprise-apps/what-is-single-sign-on) (SSO) experience on Office applications such as Outlook and Teams, which could prevent you from connecting to backend services or synchronizing data. - Office apps display losing network connectivity even though other applications, such as Edge, retain intranet and internet access. This issue is caused by a deadlock in the interactions between the Azure Active Directory(AAD) broker and the underlying AppX deployment service(AppxSvc) and Background tasks infrastructure service.You are more likely to experience this issue if you are using FSLogix (https://learn.microsoft.com/fslogix/overview-what-is-fslogix) user profile containers on multi-session environments. FSLogix is a Microsoft tool that helps manage and speed up user profiles on computers, especially in virtual environments like remote desktops. Please note that this issue is different from the scenario where the AppX Deployment Service (AppxSvc) was in an invalid state, causing a black screen. That issue was resolved with Windows updates released on October 22, 2024 (KB5045594 (https://support.microsoft.com/help/5045594)), and later. Windows 10 Education edition users and home users of Windows using Home or Pro editions are unlikely to face this issue as Azure Virtual Desktop is more commonly used in enterprise environments. Next Steps: We are investigating the issue and provide an update where more information is available. Affected platforms: - Client: Windows 10, version 22H2 - Server: None Click here (https://admin.microsoft.com/Adminportal/Home?#/windowsreleasehealth/:/wrhpreferences) to manage email notifications for Windows known issues.