Failedtounregistermasterimagefrommdm [hot] -

Remove-DesktopPool -pool_id "PoolName" -DeleteFromDisk -Force – delete image reference directly:

Remember: always back up your MDM database before any manual intervention. A few cautious minutes can save a full day of recovery. Last updated: March 2025 – Applies to Citrix DaaS 2402+, VMware Horizon 8, and Microsoft Configuration Manager current branch. failedtounregistermasterimagefrommdm

Introduction In virtual desktop infrastructure (VDI) and mobile device management (MDM) environments—especially those using Citrix , VMware Horizon , or Microsoft Intune/Configuration Manager —IT administrators often encounter the cryptic error: “Failed to unregister master image from MDM.” This message typically appears during image lifecycle management, when you attempt to remove, update, or recompose a master (gold) image from the MDM database. Left unresolved, it can block further provisioning, waste storage, and cause conflicts in future deployment tasks. when you attempt to remove

(use with caution):

:

SELECT * FROM MasterImages WHERE ImageName = 'YourImageName'; DELETE FROM MasterImages WHERE ImageName = 'YourImageName'; For , run the following against the vCenter or Composer database: it can block further provisioning