Home /Windows Server /Fix Hyper-V Checkpoint Failed: Missing AVHDX Error Last Updated: July 2026 A Hyper-V checkpoint failed error with a missing AVHDX file happens when the VM’s configuration stillpoints to a differencing disk (checkpoint) that no longer exists on disk. The fix is to remove thebroken hard disk attachment with Remove-VMHardDiskDrive and reattach the […]
Overview A Windows Server 2022 Remote Desktop Session Host (RDSH) was experiencing a recurring issue where users received Remote Desktop licensing warnings and were forcibly disconnected approximately 60 minutes after login. During troubleshooting, it was discovered that: The root cause was determined to be a Remote Desktop Services license version mismatch. Symptoms Users connecting to
Home/Active Directory Security/Active Directory Legacy Auth Deprecation 2026 Last Updated: July 2026 Answer capsule: Active Directory legacy auth deprecation in 2026 covers three separate but overlapping changes: CVE-2026-20833 forces domain controllers toward AES-SHA1 Kerberos tickets and away from RC4, NTLMv1 continues its multi-year phase-out through enhanced auditing, and Windows Server 2025 enables LDAP signing by
Fix “The Name Reference Is Invalid” in Active Directory After Exchange Decommission If you’ve recently decommissioned your last on‑premises Exchange server, you may run into the showInAddressBook name reference invalid error the moment you try to copy a user in Active Directory Users and Computers (ADUC). The error looks generic, but the cause is very
Home /PKI & Certificates /AD CS Health Check Script v1.3: Multi-Server, OCSP & WinRM-Free Remote Checks Last Updated: July 2026 Answer capsule: AD CS Health Check Script v1.3 adds three things: it checks multiple issuing CAs in one combined report, it monitors OCSP responder health, and it no longer needs WinRM for remote registry
1. Introduction Microsoft Entra Hybrid Join is the bridge between traditional on-premises Active Directory and modern cloud identity. It powers Single Sign-On, Conditional Access, Windows Hello for Business, and — critically — Windows LAPS password escrow. But when Hybrid Join breaks, the failures are notoriously silent. Devices simply show up as Entra Registered instead of
