Step-by-step guides and fixes for server administrators: cPanel, DirectAdmin, Windows Server, email, DNS, security and more. Free to read, tested on real servers. Press / to search.
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Imunify360 Missing from WHM: 4 Fixes
Restore the Imunify360 icon in WHM when the plugin is registered but disabled, the agent is stopped, the install was corrupted, or a cPanel update removed the plugin registration, using imunify360-agent enable-plugin and reinstall steps.
September 29, 2026
Horizon Agent Unreachable and Pending Desktops: Fixes
Resolve Omnissa Horizon desktops reporting Agent Unreachable or stuck in Pending, Provisioning or Customizing by checking the Horizon Agent service, JMS pairing, DNS and time, firewall port 4001, instant-clone parent state and Connection Server logs.
September 29, 2026
ESXi APD PDL: Datastore Not Accessible, Safe Recovery Steps
Diagnose and recover from ESXi datastore inaccessibility caused by All Paths Down or Permanent Device Loss on ESXi 7, 8 and 9, using esxcli storage commands, vmkernel.log, path rescans, APD timeout settings and vSphere HA component protection.
September 29, 2026
Cloudflare Error 521, 522 and 525 on cPanel: Fixes
Diagnose and resolve Cloudflare 521 (origin refused), 522 (connection timed out) and 525 (SSL handshake failed) on cPanel servers by checking CSF blocks, Apache status, origin certificates and the SSL mode, with commands to verify each fix.
September 29, 2026
Autopilot Error 80180003 and 80180014: Fixes
Diagnose and resolve the Autopilot MDM enrollment failures 80180003 and 80180014 on Windows 11, covering the device enrollment limit, MDM user scope, licensing, and the DeviceManagement event log.
September 29, 2026
AD Replication Error 1722 and 8453: Fixes
How to diagnose and clear the two most common Active Directory replication failures, 8453 "Replication access was denied" and 1722 "The RPC server is unavailable", with repadmin, portqry, DNS checks and secure-channel resets.
September 29, 2026
AD Account Lockout Source: Event 4740 Tracing
How to trace a repeating Active Directory account lockout back to the machine and process causing it, using Event ID 4740 on the PDC emulator, Event 4625 on the source host, and the usual suspects such as cached credentials and mapped drives.
September 29, 2026
DFS Namespaces and Replication: Reliable File Server Setup
Build a domain-based DFS namespace on Windows Server 2025 so users reach shares through one path, add a second file server with DFS Replication for redundancy or branch access, size the staging quota, and monitor backlog so replication never silently stalls.
September 29, 2026
Enable SSH on ESXi and the 40 esxcli commands every VMware admin needs
Turn on SSH for ESXi 7, 8 and 9 from the client, DCUI or PowerCLI, lock it down, and keep a working set of esxcli commands for host, network, storage, VM, software and hardware checks that cover daily operations.
September 29, 2026
Enable Remote Desktop with Group Policy: NLA, Firewall Rules and User Access
Turn on RDP for Windows 11 and Windows Server 2025 computers with one GPO: allow connections, require Network Level Authentication, open the Remote Desktop firewall rules, manage Remote Desktop Users, optionally change the port, and do the same with Intune.
September 29, 2026
Enable and use the Active Directory Recycle Bin to restore deleted objects
How to switch on the Active Directory Recycle Bin, restore deleted users, groups and computers with Restore-ADObject or the Administrative Center, recover an entire deleted OU in the right order, and what to do when the Recycle Bin was never enabled.
September 29, 2026
Disable RDP Drive Redirection with GPO: Clipboard, Printers, USB and Smart Cards
Block drive, clipboard, printer, USB and smart card redirection in Remote Desktop sessions on Windows Server 2025 and Windows 11 with session host Group Policy, client-side registry values, RDS collection properties and Intune, and keep an exception for IT.
September 29, 2026