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A staged container runs the intended IIS application with repeatable deployment and external durable state while unsupported system-level dependencies are identified. This step is relevant to Container migration decision for IIS workloads but is not one of the complementary steps this case needs. The intended pair is: Migrate DHCP configurations, leases and reservations with supported export/import approaches, confirm AD authorization where required, and avoid simultaneous unauthorized lease offers. and Inspect scope options, exclusions, lease database, failover partnerships, DHCP server authorization, relay agent paths and client renewal traces. Situation: A replacement DHCP server imports scopes but is not authorized in Active Directory, so domain clients receive no new leases.

Migrate Windows print queues/drivers or RDS session-host services using supported role-specific tools and compatibility assessment, with user mapping and licensing checks. This step is relevant to Print and Remote Desktop Services host migration but is not one of the complementary steps this case needs. The intended pair is: Migrate DHCP configurations, leases and reservations with supported export/import approaches, confirm AD authorization where required, and avoid simultaneous unauthorized lease offers. and Inspect scope options, exclusions, lease database, failover partnerships, DHCP server authorization, relay agent paths and client renewal traces. Situation: A replacement DHCP server imports scopes but is not authorized in Active Directory, so domain clients receive no new leases.

Inspect share protocol and identity integration, Azure storage account security, network path, Azure File Sync sync group, cloud tiering policy, and SMB ACL compatibility. This step is relevant to Azure Files and Azure File Sync migration strategy but is not one of the complementary steps this case needs. The intended pair is: Migrate DHCP configurations, leases and reservations with supported export/import approaches, confirm AD authorization where required, and avoid simultaneous unauthorized lease offers. and Inspect scope options, exclusions, lease database, failover partnerships, DHCP server authorization, relay agent paths and client renewal traces. Situation: A replacement DHCP server imports scopes but is not authorized in Active Directory, so domain clients receive no new leases.

Time-series evidence isolates the constrained resource and shows whether a tested change improves application throughput without creating another bottleneck. This step is relevant to Performance Monitor baseline and Data Collector Sets but is not one of the complementary steps this case needs. The intended pair is: Diagnose Windows Update scan, delivery and servicing errors together with Windows Time Service hierarchy and Kerberos clock-skew failures before resetting services or changing policy. and Inspect update service policy, error codes and servicing logs, WSUS or internet endpoint connectivity, w32tm status/peers, time offset, and domain controller time hierarchy. Situation: A newly promoted domain controller is configured with arbitrary external NTP peers instead of following the intended domain time hierarchy.

Inspect agent/extension deployment, DCR associations and transform rules, Log Analytics destination, heartbeat, VM Insights dependencies and alert action group routing. This step is relevant to Azure Monitor data collection rules and VM Insights but is not one of the complementary steps this case needs. The intended pair is: Diagnose Windows Update scan, delivery and servicing errors together with Windows Time Service hierarchy and Kerberos clock-skew failures before resetting services or changing policy. and Inspect update service policy, error codes and servicing logs, WSUS or internet endpoint connectivity, w32tm status/peers, time offset, and domain controller time hierarchy. Situation: A newly promoted domain controller is configured with arbitrary external NTP peers instead of following the intended domain time hierarchy.

Troubleshoot startup and storage failures using boot-state evidence, disk and encryption health, and Azure Arc or Azure VM extension instance logs while preserving a recoverable path. This step is relevant to Boot, storage and Azure Arc extension failures but is not one of the complementary steps this case needs. The intended pair is: Diagnose Windows Update scan, delivery and servicing errors together with Windows Time Service hierarchy and Kerberos clock-skew failures before resetting services or changing policy. and Inspect update service policy, error codes and servicing logs, WSUS or internet endpoint connectivity, w32tm status/peers, time offset, and domain controller time hierarchy. Situation: A newly promoted domain controller is configured with arbitrary external NTP peers instead of following the intended domain time hierarchy.

Inspect DFSR event logs and backlog, SYSVOL and NETLOGON shares, GPO version consistency, Entra Connect export/import errors, sync scope and sign-in method health. This examines SYSVOL DFSR and hybrid synchronization troubleshooting, a different fault or management boundary. For this case the decisive evidence is: Inspect Recycle Bin enablement and deleted-object lifetime, system-state backups, deletion scope, replication state, and authoritative versus nonauthoritative recovery requirements. Situation: A domain controller's directory database is corrupt and will not start AD DS, yet the team tries to use a normal deleted-object restore.

Inspect update service policy, error codes and servicing logs, WSUS or internet endpoint connectivity, w32tm status/peers, time offset, and domain controller time hierarchy. This examines Windows Update and Time Service troubleshooting, a different fault or management boundary. For this case the decisive evidence is: Inspect Recycle Bin enablement and deleted-object lifetime, system-state backups, deletion scope, replication state, and authoritative versus nonauthoritative recovery requirements. Situation: A domain controller's directory database is corrupt and will not start AD DS, yet the team tries to use a normal deleted-object restore.

Inspect CPU processor queue, memory commit and paging, logical disk latency and queue, network throughput, data collector schedule and workload timing. This examines Performance Monitor baseline and Data Collector Sets, a different fault or management boundary. For this case the decisive evidence is: Inspect Recycle Bin enablement and deleted-object lifetime, system-state backups, deletion scope, replication state, and authoritative versus nonauthoritative recovery requirements. Situation: A domain controller's directory database is corrupt and will not start AD DS, yet the team tries to use a normal deleted-object restore.

Users can access migrated shares with the original intended permissions and file content before old server identity is retired. This tests Storage Migration Service inventory and file-share ACL transfer, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: An assessment reports source inventory and application dependencies with justified target sizes and clearly documented incompatibilities before any replication begins. Situation: An Azure Migrate appliance appears connected but identifies only a subset of on-premises servers because it lacks inventory credentials.

The Azure VM starts in the intended network with correct data and app dependencies, and final switchover is tracked without leaving two writable production copies. This tests Azure Migrate test migration and production cutover, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: An assessment reports source inventory and application dependencies with justified target sizes and clearly documented incompatibilities before any replication begins. Situation: An Azure Migrate appliance appears connected but identifies only a subset of on-premises servers because it lacks inventory credentials.

Existing SMB UNC client paths resolve to the replacement and source server is safely retired or isolated without simultaneous identity conflicts. This tests Storage Migration Service cutover server identity, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: An assessment reports source inventory and application dependencies with justified target sizes and clearly documented incompatibilities before any replication begins. Situation: An Azure Migrate appliance appears connected but identifies only a subset of on-premises servers because it lacks inventory credentials.

Inspect vault registration, MARS agent health, encryption passphrase custody, schedule/retention policy, recovery point availability, and job failures. This examines Azure Backup vault policy and MARS agent protection, a different fault or management boundary. For this case the decisive evidence is: Inspect recovery point type, snapshot and vault tiers, encrypted disk keys/Key Vault permissions, VM extensions, destination network, and restore permissions. Situation: A database operator restores an Azure VM into the production subnet for testing and unintentionally creates duplicate hostname and domain identity.

Review service dependencies, recovery plan groups, available recovery points, test failover network, re-protection state, and automation credentials. This examines Site Recovery recovery-plan ordering and controlled failover, a different fault or management boundary. For this case the decisive evidence is: Inspect recovery point type, snapshot and vault tiers, encrypted disk keys/Key Vault permissions, VM extensions, destination network, and restore permissions. Situation: A database operator restores an Azure VM into the production subnet for testing and unintentionally creates duplicate hostname and domain identity.

Inspect ipconfig and DNS suffixes, Resolve-DnsName results, authoritative zone records, effective firewall rules, route table, and Test-NetConnection outputs. This examines Windows DNS and network connectivity troubleshooting, a different fault or management boundary. For this case the decisive evidence is: Inspect recovery point type, snapshot and vault tiers, encrypted disk keys/Key Vault permissions, VM extensions, destination network, and restore permissions. Situation: A database operator restores an Azure VM into the production subnet for testing and unintentionally creates duplicate hostname and domain identity.

Select S2D resiliency and volume layout for expected workloads and node count, balancing performance, fault tolerance and capacity before expanding or rebalancing a cluster. This would address S2D resilient volume layout and safe node expansion, not the controlling issue in this situation. Two-way and three-way mirroring and parity have different fault tolerance and capacity costs; the best layout depends on eligible node count and workload behavior. The targeted response is: Select supported clustered shared storage or Storage Spaces Direct layout, configure site/fault-domain awareness, and validate a Scale-Out File Server or stretched-cluster application where applicable. Situation: A cluster administrator enables a Scale-Out File Server role but underlying SMB continuous availability and storage network capacity have not been tested.

Configure validated high-bandwidth cluster networking with Network ATC intents on supported Windows Server platforms and check SMB Direct/RDMA settings, VLANs and adapter symmetry. This would address Network ATC intent and SMB Direct/RDMA for S2D, not the controlling issue in this situation. Network ATC automates consistent host network intent where supported but cannot compensate for mismatched NIC hardware, unsuitable switch configuration, or unavailable RDMA support. The targeted response is: Select supported clustered shared storage or Storage Spaces Direct layout, configure site/fault-domain awareness, and validate a Scale-Out File Server or stretched-cluster application where applicable. Situation: A cluster administrator enables a Scale-Out File Server role but underlying SMB continuous availability and storage network capacity have not been tested.

Implement supported clustered roles with correctly configured client access points, floating addresses where applicable, network roles, shared storage, and validated failover dependencies. This would address Failover cluster roles, client access and network configuration, not the controlling issue in this situation. Failover clustering manages designated resources and dependencies; healthy nodes alone do not guarantee clients can resolve a virtual name or reach a floating IP. The targeted response is: Select supported clustered shared storage or Storage Spaces Direct layout, configure site/fault-domain awareness, and validate a Scale-Out File Server or stretched-cluster application where applicable. Situation: A cluster administrator enables a Scale-Out File Server role but underlying SMB continuous availability and storage network capacity have not been tested.

Inspect web application framework/runtime version, authentication, Windows-specific dependencies, on-premises database connections, environment settings and certificates. This step is relevant to Azure App Service migration for compatible IIS applications but is not one of the complementary steps this case needs. The intended pair is: Use Storage Migration Service to inventory source servers, transfer files, shares and access-control settings, then verify data completeness before the cutover stage. and Inspect SMS inventory findings, share mapping, file ownership, NTFS and share ACLs, open-file behavior, transfer logs and destination space. Situation: An SMB file transfer reports a small number of locked or skipped files and the operator schedules cutover without reviewing the exceptions.

A staged container runs the intended IIS application with repeatable deployment and external durable state while unsupported system-level dependencies are identified. This step is relevant to Container migration decision for IIS workloads but is not one of the complementary steps this case needs. The intended pair is: Use Storage Migration Service to inventory source servers, transfer files, shares and access-control settings, then verify data completeness before the cutover stage. and Inspect SMS inventory findings, share mapping, file ownership, NTFS and share ACLs, open-file behavior, transfer logs and destination space. Situation: An SMB file transfer reports a small number of locked or skipped files and the operator schedules cutover without reviewing the exceptions.

Execute a planned Storage Migration Service cutover, optionally transferring the legacy server name and IP to its replacement after final synchronization and an approved maintenance window. This step is relevant to Storage Migration Service cutover server identity but is not one of the complementary steps this case needs. The intended pair is: Use Storage Migration Service to inventory source servers, transfer files, shares and access-control settings, then verify data completeness before the cutover stage. and Inspect SMS inventory findings, share mapping, file ownership, NTFS and share ACLs, open-file behavior, transfer logs and destination space. Situation: An SMB file transfer reports a small number of locked or skipped files and the operator schedules cutover without reviewing the exceptions.

Inspect App Control audit events, signer certificates, file hashes, software inventory, policy version, and drivers that would be blocked. This examines Windows Defender Application Control trust policy, a different fault or management boundary. For this case the decisive evidence is: Verify OS version, OSConfig module, the DomainController or MemberServer baseline scenario, conflicting Group Policy settings, and documented compatibility exceptions. Situation: An administrator attempts to run the new OSConfig role baseline on Windows Server 2019 and expects the same support as on 2025.

Inspect protector types, TPM health, recovery key escrow/access audit, suspension state, drive encryption status, and recovery environment prerequisites. This examines BitLocker recovery and protector escrow, a different fault or management boundary. For this case the decisive evidence is: Verify OS version, OSConfig module, the DomainController or MemberServer baseline scenario, conflicting Group Policy settings, and documented compatibility exceptions. Situation: An administrator attempts to run the new OSConfig role baseline on Windows Server 2019 and expects the same support as on 2025.

Inspect proxy connectivity, DC agent version, banned password policy, enforcement mode, password-change events, and Protected Users group membership. This examines Microsoft Entra Password Protection with Protected Users, a different fault or management boundary. For this case the decisive evidence is: Verify OS version, OSConfig module, the DomainController or MemberServer baseline scenario, conflicting Group Policy settings, and documented compatibility exceptions. Situation: An administrator attempts to run the new OSConfig role baseline on Windows Server 2019 and expects the same support as on 2025.

The correct role-specific baseline is applied with measurable compliance and approved exceptions; business services and remote management remain functional. This step is relevant to OSConfig role-based Windows Server 2025 baseline but is not one of the complementary steps this case needs. The intended pair is: Encrypt supported Windows Server volumes with managed BitLocker protectors, escrow recovery information, and test safe recovery procedures before changing boot configuration. and Inspect protector types, TPM health, recovery key escrow/access audit, suspension state, drive encryption status, and recovery environment prerequisites. Situation: A remote operations site needs to recover encrypted Windows Server disks without sharing one recovery password across all machines.

Plan supported Azure VM disk encryption at rest with managed disks, chosen encryption-at-host or customer-managed keys as required, and a tested Key Vault/recovery process for applicable configurations. This step is relevant to Azure VM disk encryption keys and recovery but is not one of the complementary steps this case needs. The intended pair is: Encrypt supported Windows Server volumes with managed BitLocker protectors, escrow recovery information, and test safe recovery procedures before changing boot configuration. and Inspect protector types, TPM health, recovery key escrow/access audit, suspension state, drive encryption status, and recovery environment prerequisites. Situation: A remote operations site needs to recover encrypted Windows Server disks without sharing one recovery password across all machines.

Inspect Azure Monitor Agent and Arc prerequisites, DCR association, event channel selection, workspace destination, ingestion latency, and KQL query results. This step is relevant to Microsoft Sentinel Windows security-event ingestion but is not one of the complementary steps this case needs. The intended pair is: Encrypt supported Windows Server volumes with managed BitLocker protectors, escrow recovery information, and test safe recovery procedures before changing boot configuration. and Inspect protector types, TPM health, recovery key escrow/access audit, suspension state, drive encryption status, and recovery environment prerequisites. Situation: A remote operations site needs to recover encrypted Windows Server disks without sharing one recovery password across all machines.

Inspect computer identity certificates or Kerberos eligibility, IPsec rule scope, security associations, network path, exemptions, and connection security logs. This examines Windows IPsec connection security and domain isolation, a different fault or management boundary. For this case the decisive evidence is: Verify OS version, OSConfig module, the DomainController or MemberServer baseline scenario, conflicting Group Policy settings, and documented compatibility exceptions. Situation: After baseline rollout a legacy SMB client fails because its protocol is below the approved minimum; the team wants a broad rollback without checking the exception path.

Inspect RODC allowed and denied replication groups, cached password list, delegated local administration, replication sources, and site connectivity. This examines RODC password replication policy in branch offices, a different fault or management boundary. For this case the decisive evidence is: Verify OS version, OSConfig module, the DomainController or MemberServer baseline scenario, conflicting Group Policy settings, and documented compatibility exceptions. Situation: After baseline rollout a legacy SMB client fails because its protocol is below the approved minimum; the team wants a broad rollback without checking the exception path.

Inspect App Control audit events, signer certificates, file hashes, software inventory, policy version, and drivers that would be blocked. This examines Windows Defender Application Control trust policy, a different fault or management boundary. For this case the decisive evidence is: Verify OS version, OSConfig module, the DomainController or MemberServer baseline scenario, conflicting Group Policy settings, and documented compatibility exceptions. Situation: After baseline rollout a legacy SMB client fails because its protocol is below the approved minimum; the team wants a broad rollback without checking the exception path.

Onboard eligible on-premises Windows Servers through Azure Arc and the correct Microsoft Defender for Servers plan, then verify agent health, recommendations and security coverage. This would address Defender for Servers onboarding and Azure Arc posture, not the controlling issue in this situation. Azure Arc provides an Azure management plane for non-Azure servers; Defender for Servers capabilities require correct plan and component enrollment beyond Arc registration. The targeted response is: Install and health-check Microsoft Defender for Identity sensors on supported domain controllers and correlate identity threat detections with actual directory activity. Situation: An organization wants to investigate a suspected lateral movement path from a compromised workstation to its domain controller using identity telemetry.

Apply minimal Azure Network Security Group rules at the appropriate subnet and network interface scope, and diagnose actual effective security rules and routes before changing access. This would address Azure NSG effective rules for Windows Server VMs, not the controlling issue in this situation. Azure NSG rules are prioritized and applied to virtual network paths; a Windows guest firewall or a different attached NSG can still affect traffic. The targeted response is: Install and health-check Microsoft Defender for Identity sensors on supported domain controllers and correlate identity threat detections with actual directory activity. Situation: An organization wants to investigate a suspected lateral movement path from a compromised workstation to its domain controller using identity telemetry.

Inventory NTLM authentication paths and privilege-tier boundaries, enforce authentication policy silos for supported high-value accounts, and phase out unsafe NTLM dependencies after testing. This would address NTLM audit and authentication policy silo hardening, not the controlling issue in this situation. A domain-wide NTLM disable without usage discovery can break legacy systems; authentication policy silos narrow where sensitive accounts may authenticate. The targeted response is: Install and health-check Microsoft Defender for Identity sensors on supported domain controllers and correlate identity threat detections with actual directory activity. Situation: An organization wants to investigate a suspected lateral movement path from a compromised workstation to its domain controller using identity telemetry.