Failedtounregistermasterimagefrommdm ✦ Verified Source

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

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. failedtounregistermasterimagefrommdm

Remove-ProvMasterImage -ProvisioningSchemeName "YourScheme" -MasterImageVM "YourImage" -ForgetVM : A few cautious minutes can save a full day of recovery

SELECT * FROM MasterImages WHERE ImageName = 'YourImageName'; DELETE FROM MasterImages WHERE ImageName = 'YourImageName'; For , run the following against the vCenter or Composer database: VMware Horizon 8

(use with caution):

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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.