TECHRUNBOOK KNOWLEDGE HUB

Practical answers for
real infrastructure problems.

Step-by-step troubleshooting and automation guides for Windows Server, VMware, Hyper-V, Azure, PowerShell and MABS.

NEW SEO GUIDES

New Infrastructure Troubleshooting Guides

Fresh runbooks covering VMware, Windows Server, PowerShell, MABS, Hyper-V and Azure.

VMWARE · NEW GUIDE

VMware VMDK Locked: Troubleshooting Guide

Troubleshoot VMware VMDK file lock errors that block VM power-on, snapshot consolidation, migration or disk operations.

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VMWARE · NEW GUIDE

VMware Datastore High Latency: Troubleshooting Runbook

Diagnose VMware datastore latency caused by storage contention, path issues, queue depth, snapshots or backend storage problems.

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VMWARE · NEW GUIDE

VMware ESXi Network Connectivity Troubleshooting Checklist

Troubleshoot ESXi management and VMkernel connectivity by checking VLANs, routes, MTU, vmnics, port groups and physical switch paths.

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VMWARE · NEW GUIDE

VMware vCenter Server Service Troubleshooting Guide

Troubleshoot vCenter Server service problems when the UI is unavailable, tasks fail or ESXi hosts stop responding to vCenter.

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VMWARE · NEW GUIDE

VMware Snapshot Delta Disk Growth: Troubleshooting Guide

Understand and troubleshoot rapid VMware snapshot delta disk growth before datastore capacity becomes critical.

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VMWARE · NEW GUIDE

VMware ESXi Datastore Not Visible: Troubleshooting Guide

Troubleshoot a datastore that is missing from one or more ESXi hosts by checking storage presentation, paths, VMkernel configuration and signatures.

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VMWARE · NEW GUIDE

VMware vMotion Network Troubleshooting Guide

Diagnose vMotion failures caused by VMkernel configuration, VLANs, MTU, routing, DNS or physical network problems.

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VMWARE · NEW GUIDE

VMware ESXi Host Performance Troubleshooting Checklist

Use a structured checklist to investigate ESXi CPU, memory, storage and network performance problems.

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POWERSHELL · NEW GUIDE

PowerCLI: Find Old VMware Snapshots

Use VMware PowerCLI to identify old snapshots, their age, VM names and sizes so administrators can review snapshot risk.

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POWERSHELL · NEW GUIDE

PowerCLI: VMware Datastore Capacity Report

Generate a VMware datastore capacity report with PowerCLI to identify low free space and prioritize storage cleanup.

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WINDOWS SERVER · NEW GUIDE

Windows Server DNS Forwarder Troubleshooting Guide

Troubleshoot Windows Server DNS forwarding failures by checking forwarders, recursion, firewall rules, routes and upstream DNS availability.

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WINDOWS SERVER · NEW GUIDE

Active Directory Replication Troubleshooting Runbook

Troubleshoot Active Directory replication failures by checking DNS, connectivity, replication status, time synchronization and event logs.

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WINDOWS SERVER · NEW GUIDE

Windows Server DHCP Troubleshooting Guide

Troubleshoot Windows Server DHCP failures by checking scopes, leases, authorization, network relay and DHCP Server service health.

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WINDOWS SERVER · NEW GUIDE

IIS 502 Bad Gateway Troubleshooting Guide

Troubleshoot IIS 502 errors by checking application pools, reverse proxy settings, backend services, bindings and Windows event logs.

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WINDOWS SERVER · NEW GUIDE

Windows Server SMB Port 445 Troubleshooting Guide

Troubleshoot SMB file share connectivity by checking TCP 445, Windows Firewall, DNS, authentication and share permissions.

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WINDOWS SERVER · NEW GUIDE

Windows Event Forwarding Troubleshooting Guide

Troubleshoot Windows Event Forwarding subscriptions by checking WinRM, collector configuration, firewall rules and source connectivity.

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WINDOWS SERVER · NEW GUIDE

Windows Server Storage Spaces Troubleshooting Guide

Troubleshoot Storage Spaces problems by checking physical disks, pools, virtual disks, health status and recent storage changes.

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POWERSHELL · NEW GUIDE

PowerShell Remoting Firewall Troubleshooting

Troubleshoot PowerShell remoting failures by checking WinRM listeners, firewall rules, authentication, DNS and TrustedHosts where applicable.

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POWERSHELL · NEW GUIDE

PowerShell Server Health Check Script

Build a repeatable PowerShell server health check covering uptime, disk space, services, memory and connectivity.

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POWERSHELL · NEW GUIDE

PowerShell: Check Open TCP Ports on Windows Servers

Use PowerShell Test-NetConnection to test common infrastructure ports such as DNS, SMB, WinRM, RDP, HTTPS and SQL Server.

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POWERSHELL · NEW GUIDE

PowerShell: Export Windows Services Health Report

Create a PowerShell report of Windows services, startup types and current states for infrastructure monitoring and audit.

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POWERSHELL · NEW GUIDE

PowerShell: Export Hyper-V VM Inventory

Use PowerShell to export Hyper-V virtual machine inventory including state, host, memory, CPU and network details.

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POWERSHELL · NEW GUIDE

PowerShell: Find Recent Windows Event Log Errors

Use PowerShell to identify recent Error and Critical events across Windows Server event logs.

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MABS · NEW GUIDE

MABS Backup Job Failed: Troubleshooting Runbook

Troubleshoot failed Microsoft Azure Backup Server jobs by checking datasource status, protection groups, disk space, agents, SQL and recovery point dependencies.

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MABS · NEW GUIDE

MABS Protection Group Troubleshooting Guide

Troubleshoot MABS protection groups that stop creating recovery points or show datasource errors.

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MABS · NEW GUIDE

MABS Disk Space Troubleshooting Guide

Troubleshoot MABS disk capacity issues affecting replicas, recovery points and backup jobs.

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MABS · NEW GUIDE

MABS Agent Communication Troubleshooting Guide

Troubleshoot MABS agent communication failures by checking services, firewall, name resolution, credentials and connectivity.

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HYPER-V · NEW GUIDE

Hyper-V Virtual Machine Management Service Troubleshooting

Troubleshoot Hyper-V VMMS service issues that prevent virtual machines from starting, stopping, or being managed.

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HYPER-V · NEW GUIDE

Hyper-V Storage Live Migration Troubleshooting Guide

Troubleshoot Hyper-V storage migration failures by checking destination capacity, permissions, cluster state, networking and VM disk configuration.

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AZURE · NEW GUIDE

Azure VM RDP Connectivity Troubleshooting Guide

Troubleshoot Azure Windows VM RDP failures by checking NSGs, routes, guest firewall, RDP service and Azure VM health.

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AZURE · NEW GUIDE

Azure VM Extension Failed: Troubleshooting Guide

Troubleshoot Azure VM extension failures by checking agent health, extension status, networking, permissions and guest operating system conditions.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Windows Server DNS Troubleshooting: Complete Checklist

Troubleshoot Windows Server DNS problems by checking name resolution, DNS records, client configuration, forwarding, services and connectivity.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Windows Server Event Viewer Troubleshooting Guide

Use Windows Event Viewer effectively to identify service failures, authentication problems, networking errors and system issues.

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IT INFRASTRUCTURE · TROUBLESHOOTING

VMware Snapshot Consolidation Troubleshooting Guide

Troubleshoot VMware snapshot consolidation failures by checking locks, datastore space, snapshots, virtual disks and host access.

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IT INFRASTRUCTURE · TROUBLESHOOTING

VMware vMotion Troubleshooting: Practical Checklist

Troubleshoot VMware vMotion failures by checking networking, CPU compatibility, storage, permissions, VM configuration and host health.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Hyper-V Checkpoint Troubleshooting Guide

Troubleshoot Hyper-V checkpoint and AVHDX issues by checking storage, merge operations, VM state, permissions and available disk space.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Hyper-V Network Troubleshooting Checklist

Troubleshoot Hyper-V VM connectivity by checking virtual switches, VLANs, virtual NICs, SET teaming, routing and Windows Firewall.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Azure NSG Troubleshooting: Network Security Group Checklist

Troubleshoot Azure Network Security Groups by checking effective rules, priorities, subnet and NIC associations, routes and application ports.

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IT INFRASTRUCTURE · TROUBLESHOOTING

PowerShell Remoting Troubleshooting: WinRM and PSRemoting

Troubleshoot PowerShell remoting with Test-WSMan, WinRM listeners, firewall rules, authentication, DNS and endpoint configuration.

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IT INFRASTRUCTURE · TROUBLESHOOTING

MABS Recovery Point Troubleshooting Guide

Troubleshoot missing or outdated MABS recovery points by checking protection groups, jobs, datasource status, storage and synchronization.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Windows Server Certificate Troubleshooting Checklist

Troubleshoot Windows Server certificate problems by checking certificate stores, expiration, trust chains, private keys, bindings and permissions.

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IT INFRASTRUCTURE · TROUBLESHOOTING

RPC Server Unavailable in Windows Server: Complete Troubleshooting Guide

Fix the Windows Server RPC server unavailable error with a practical checklist covering DNS, TCP 135, RPC services, Windows Firewall, WMI and connectivity.

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IT INFRASTRUCTURE · TROUBLESHOOTING

VMware ESXi Host Maintenance Checklist: Safe Production Procedure

Use this VMware ESXi maintenance checklist to validate VM placement, vMotion, storage, networking, host health and post-maintenance checks.

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IT INFRASTRUCTURE · TROUBLESHOOTING

PowerShell Server Health Check: Practical Windows Server Script Guide

Learn how to build a PowerShell health check for CPU, memory, disk space, services, networking and Windows Server operational status.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Hyper-V Live Migration Troubleshooting: Common Errors and Checks

Troubleshoot Hyper-V live migration failures by checking networking, permissions, cluster health, storage, authentication and VM configuration.

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IT INFRASTRUCTURE · TROUBLESHOOTING

MABS Backup Monitoring: How to Check Protection and Recovery Points

Build a practical Microsoft Azure Backup Server monitoring workflow for protected servers, failed jobs, recovery points and backup health.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Azure VM Network Troubleshooting Checklist

Troubleshoot Azure VM connectivity by checking IP configuration, NSGs, routes, DNS, guest firewall and effective network security rules.

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IT INFRASTRUCTURE · TROUBLESHOOTING

Windows Server Low Disk Space: Troubleshooting and Cleanup Checklist

Find the cause of low disk space on Windows Server and apply a safe investigation workflow before deleting production data.

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IT INFRASTRUCTURE · TROUBLESHOOTING

VMware Datastore Full: Troubleshooting Checklist

Troubleshoot a full VMware datastore safely by checking snapshots, thin provisioning, logs, ISO files, orphaned files and VM growth.

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IT INFRASTRUCTURE · TROUBLESHOOTING

WinRM Troubleshooting: Windows Server Remote Management Checklist

Troubleshoot WinRM and PowerShell remoting by checking listeners, ports, firewall rules, authentication, TrustedHosts and service status.

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IT INFRASTRUCTURE · TROUBLESHOOTING

PowerShell Server Inventory Automation: Build a Reusable Report

Create a reusable PowerShell inventory workflow for Windows Server names, OS versions, IP addresses, disks, memory and services.

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WINDOWS SERVER · TROUBLESHOOTING

Windows Server Time Synchronization Troubleshooting Checklist

Troubleshoot Windows Server time drift, Windows Time service failures, domain time hierarchy problems and clock skew affecting authentication and applications.

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WINDOWS SERVER · TROUBLESHOOTING

Windows Server Service Not Starting: Troubleshooting Runbook

Diagnose Windows Server services that fail to start by checking dependencies, service accounts, event logs, ports, permissions and recovery settings.

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WINDOWS SERVER · TROUBLESHOOTING

Windows Server Group Policy Troubleshooting: GPUpdate and RSOP Checklist

Troubleshoot Group Policy processing failures using gpresult, RSOP, event logs, SYSVOL, DNS, replication and permissions.

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VMWARE & VSPHERE · TROUBLESHOOTING

VMware VM File Locked: Troubleshooting and Consolidation Runbook

Troubleshoot VMware virtual disk file locks, failed consolidation and inaccessible VMDK files without risking production VM data.

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VMWARE & VSPHERE · TROUBLESHOOTING

VMware vCenter Certificate Expiration Troubleshooting Guide

Diagnose VMware vCenter certificate expiration, service failures, browser warnings and trust problems using a structured certificate checklist.

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VMWARE & VSPHERE · TROUBLESHOOTING

VMware Datastore Latency Troubleshooting Checklist

Investigate VMware datastore latency by checking host paths, storage adapters, queueing, multipathing, array health and workload behavior.

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HYPER-V · TROUBLESHOOTING

Hyper-V Virtual Machine Failed to Start: Troubleshooting Runbook

Troubleshoot Hyper-V VM startup failures caused by storage, permissions, virtual switches, checkpoints, configuration and host resource problems.

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HYPER-V · TROUBLESHOOTING

Hyper-V CSV Offline: Cluster Shared Volume Troubleshooting Checklist

Troubleshoot Hyper-V Cluster Shared Volume offline and redirected-access problems involving storage paths, cluster health, permissions and networking.

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HYPER-V · TROUBLESHOOTING

Hyper-V SET Switch and VLAN Troubleshooting Guide

Troubleshoot Hyper-V Switch Embedded Teaming, VLAN tagging, management connectivity and VM network issues.

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AZURE · TROUBLESHOOTING

Azure VM Boot Failure Troubleshooting with Boot Diagnostics

Troubleshoot Azure virtual machine boot failures using Boot Diagnostics, serial console, disk checks, extensions and recovery workflows.

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AZURE · TROUBLESHOOTING

Azure Managed Disk Performance Troubleshooting Checklist

Diagnose Azure managed disk performance issues by checking disk SKU, IOPS, throughput, caching, VM limits and workload patterns.

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AZURE · TROUBLESHOOTING

Azure Private Endpoint DNS Troubleshooting Guide

Troubleshoot Azure Private Endpoint connectivity by checking private DNS zones, DNS links, name resolution and network routing.

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POWERSHELL · TROUBLESHOOTING

PowerShell Transcript Logging: Practical Automation Audit Guide

Configure PowerShell transcript logging for troubleshooting and operational auditing while keeping logs organized and useful.

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POWERSHELL · TROUBLESHOOTING

PowerShell Server Inventory to CSV: Reusable Reporting Script

Build a reusable PowerShell inventory workflow for Windows Server names, IP addresses, OS versions, disks, memory and services.

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POWERSHELL · TROUBLESHOOTING

PowerShell Scheduled Task Not Running: Troubleshooting Checklist

Troubleshoot Windows Task Scheduler jobs that run manually but fail in the background, including account, path, permissions and environment issues.

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MABS · TROUBLESHOOTING

MABS Job Stuck in Cancelling: Troubleshooting Runbook

Troubleshoot Microsoft Azure Backup Server jobs stuck in Cancelling status without restarting services during active backup operations.

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MABS · TROUBLESHOOTING

MABS Database Operation Failed: DPMDB Troubleshooting Guide

Troubleshoot Microsoft Azure Backup Server database operation failures by checking SQL Server, DPMDB health, connectivity, storage and logs.

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NEW GUIDES

More practical infrastructure runbooks

Fresh troubleshooting guides based on current Microsoft platform documentation and production-focused workflows.

WINDOWS SERVER • SMB

Windows Server SMB Troubleshooting: Share Access, Ports and Performance

A practical Windows Server SMB troubleshooting checklist covering share access, TCP connectivity, authentication, SMB versions, network interfaces and performance.

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WINDOWS SERVER • KERBEROS

Windows Server Kerberos and SPN Troubleshooting Checklist

Troubleshoot Kerberos authentication and single sign-on failures by checking DNS, SPNs, service accounts, tickets and time synchronization.

Read the guide →

HYPER-V • DISASTER RECOVERY

Hyper-V Replica Troubleshooting and Failover Checklist

A practical Hyper-V Replica runbook for replication health, authentication, recovery points, test failover and planned failover.

Read the guide →

HYPER-V • NETWORKING

Hyper-V Virtual Switch and SET Troubleshooting Guide

Troubleshoot Hyper-V virtual switches, VLAN tagging, network adapters and Switch Embedded Teaming with PowerShell checks.

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AZURE • STORAGE

Azure VM Disk Performance Troubleshooting: IOPS and Throughput

Diagnose Azure VM disk bottlenecks by separating VM limits, disk limits, workload behavior and operating-system storage latency.

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AZURE • MONITORING

Azure VM Performance Troubleshooting with Performance Diagnostics

A practical Azure VM performance checklist for high CPU, memory, disk and application response issues using Azure Monitor diagnostics.

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MABS • DISASTER RECOVERY

MABS Database Backup and Restore: DPMDB Recovery Runbook

Protect and recover the MABS DPMDB database with a practical checklist covering backup, version matching, restore and DpmSync.

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MABS • STORAGE

MABS Modern Backup Storage: Planning and Troubleshooting

Understand MABS Modern Backup Storage, protection group changes, disk capacity and common migration considerations.

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MABS • WINDOWS SERVER

MABS System State and BMR Backup Troubleshooting

Troubleshoot MABS system state and bare-metal recovery protection, including storage selection and consistency checks.

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AZURE • NETWORKING

Azure VM Connectivity Troubleshooting: NSG, Routes and TCP Tests

Troubleshoot Azure VM connectivity by checking DNS, NSGs, routes, ports, network interfaces and end-to-end connectivity.

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POWERSHELL • WINDOWS SERVER

PowerShell Remoting and WinRM: Production Troubleshooting Checklist

A production-friendly PowerShell remoting checklist covering WinRM listeners, ports, authentication, TrustedHosts and permissions.

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MABS • PROTECTION

MABS Protection Limitations: What to Check Before Adding a Workload

A pre-flight checklist for MABS protection compatibility, including storage, VM, domain and unsupported data considerations.

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VMWARE SERIES

New VMware & vSphere runbooks

Practical guides for vCenter, ESXi, vMotion, HA, storage, vSAN and PowerCLI.

VMWARE • VCENTER • ESXI

VMware ESXi Host Disconnected from vCenter: Troubleshooting Runbook

A production checklist for ESXi hosts that show Disconnected or Not Responding in vCenter, covering DNS, ports, management agents, MTU, storage and IP conflicts.

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VMWARE • VMOTION

VMware vMotion Troubleshooting: Network, CPU and Compatibility Checklist

Troubleshoot vMotion failures and slow migrations by checking VMkernel networking, CPU compatibility, storage, VLANs, MTU and migration traffic.

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VMWARE • STORAGE

VMware Datastore Full: Snapshot, Swap and Capacity Recovery Runbook

Recover from a VMware datastore reaching critical capacity and prevent VM power-on, snapshot and consolidation failures.

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VMWARE • SNAPSHOTS

VMware Snapshot Consolidation Failed: Practical Troubleshooting Guide

Troubleshoot failed or stuck VMware snapshot consolidation, including datastore capacity, hidden snapshots, backup-created snapshots and delta-chain growth.

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VMWARE • HA • CLUSTER

VMware vSphere HA Admission Control Troubleshooting

Troubleshoot vSphere HA failover alerts and admission-control issues by checking cluster capacity, reservations, policies and stale alerts.

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VMWARE • NTP • TIME

VMware ESXi Time Synchronization and Clock Skew Troubleshooting

Troubleshoot ESXi and vCenter time drift, NTP configuration and clock-skew symptoms that can affect authentication and management operations.

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VMWARE • vSAN • NETWORKING

VMware vSAN Network Troubleshooting: Partition and Packet-Loss Checklist

Troubleshoot vSAN network partitions, packet loss, heartbeat timeouts and hosts dropping in and out of the vSAN cluster.

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VMWARE • POWERCLI • AUTOMATION

VMware PowerCLI Inventory Report: VM, Host, Datastore and Snapshot Audit

Build a repeatable PowerCLI inventory report for VMs, ESXi hosts, datastores, snapshots, power state and resource allocation.

Read the guide →