The vendor has published 3 unique mention(s) for this bug: 1. On Citrix Virtual Apps™ and Desktops 2012, an Azure MCS VDA might become unresponsive or exit unexpectedly with a Session Prepare Failure message. 2. Citrix Provisioning Stream process stuck. When using Citrix Virtual Apps and Desktops™ 2012, an Azure MCS VDA VM hangs or crashes with a "Session Prepare Failure". 3. The stream process (StreamProcess.exe) might fail to recover from hung threads. Latest urls for this bug: 1. https://docs.citrix.com/us/en/provisioning/1912-ltsr/whats-new/cumulative-update-4/fixed-issues.html 2. https://docs.citrix.com/us/en/provisioning/2109/fixed-issues.html 3. https://docs.citrix.com/us/en/provisioning/2112/fixed-issues.html