Group Policy is linked but not applying: how to find out why
A step-by-step check using gpresult and the event log, with the security filtering change (MS16-072) that catches many engineers out.
Insights
Guides and short notes written from real migrations, upgrades and clean-ups.
The trust relationship between this workstation and the primary domain failed
Why a domain-joined machine loses its secure channel, and how to repair it with PowerShell without leaving and rejoining the domain.
Azure VM will not start: AllocationFailed and OverconstrainedAllocationRequest
What the allocation errors mean, how to check VM size restrictions, and the order of fixes that gets a stuck virtual machine running.
VMware vMotion fails at 14 or 21 percent: check the MTU first
A vMotion that starts and then times out is usually an MTU or network path problem. The vmkping tests that prove it.
VMware: "Virtual machine disks consolidation is needed"
How to find affected VMs with PowerCLI, check for locks and backup proxy disks, and consolidate safely.
Azure Storage 403 error: AuthorizationFailure or AuthorizationPermissionMismatch
The two 403 errors look alike but have different causes: the storage firewall, or a missing data role. How to tell them apart and fix each.