https://support.microsoft.com/en-gb/topic/october-19-2021-servicing-stack-update-kb5006751-349c013e-959d-42bc-90c5-cac95ebfbec5
October 19, 2021 Servicing Stack Update (KB5006751) - Microsoft Support
Article regarding the October 19, 2021 Azure Stack HCI servicing stack update.
octoberservicingstackupdatemicrosoft