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Inspect IIS site bindings, host headers, certificate/private key access, application pool identity and.NET runtime, external dependencies and HTTP response traces. This step is relevant to Legacy IIS configuration and certificate migration but is not one of the complementary steps this case needs. The intended pair is: Replicate supported on-premises virtual or physical servers to Azure using Azure Migrate, run an isolated test migration, and complete a planned production cutover with client and rollback validation. and Inspect replication health, source disk change rate, destination VM configuration, test migration network isolation, DNS cutover plan and postmigration agent status. Situation: An enterprise migrates application servers before a dependent database and discovers outbound connection strings still point to unavailable on-premises paths.

The App Service-hosted application responds correctly with authenticated users and stable backing data, without writing required persistent content to ephemeral local storage. 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: Replicate supported on-premises virtual or physical servers to Azure using Azure Migrate, run an isolated test migration, and complete a planned production cutover with client and rollback validation. and Inspect replication health, source disk change rate, destination VM configuration, test migration network isolation, DNS cutover plan and postmigration agent status. Situation: An enterprise migrates application servers before a dependent database and discovers outbound connection strings still point to unavailable on-premises paths.

Deploy a supported Azure Migrate appliance to discover on-premises machines, analyze performance and dependencies, and use an assessment to size Azure targets and identify migration blockers. This step is relevant to Azure Migrate discovery and dependency assessment but is not one of the complementary steps this case needs. The intended pair is: Replicate supported on-premises virtual or physical servers to Azure using Azure Migrate, run an isolated test migration, and complete a planned production cutover with client and rollback validation. and Inspect replication health, source disk change rate, destination VM configuration, test migration network isolation, DNS cutover plan and postmigration agent status. Situation: An enterprise migrates application servers before a dependent database and discovers outbound connection strings still point to unavailable on-premises paths.

Use Windows Admin Center, Windows Event Viewer and System Insights to correlate historical server events with predictive local capacity trends and configure practical administrative alerts. This would address Windows Admin Center event logs and System Insights, not the controlling issue in this situation. System Insights forecasts from collected local performance data, whereas event logs record actual events; prediction is supporting evidence, not incident confirmation. The targeted response is: 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. Situation: An Azure Arc machine is online but its custom script extension fails because the service identity cannot reach the configured package endpoint.

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. This would address Windows Update and Time Service troubleshooting, not the controlling issue in this situation. Domain time skew can break Kerberos independently of update delivery; blindly changing all NTP peers or clearing update caches can conceal root causes. The targeted response is: 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. Situation: An Azure Arc machine is online but its custom script extension fails because the service identity cannot reach the configured package endpoint.

Troubleshoot SYSVOL replication and Microsoft Entra hybrid identity synchronization using correct DFSR status, GPO version and sync connector logs, keeping on-premises and cloud failure paths distinct. This would address SYSVOL DFSR and hybrid synchronization troubleshooting, not the controlling issue in this situation. A healthy LDAP response does not guarantee SYSVOL/DFSR health, and successful on-premises GPO replication does not prove an Entra Connect export succeeded. The targeted response is: 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. Situation: An Azure Arc machine is online but its custom script extension fails because the service identity cannot reach the configured package endpoint.

New domain controllers replicate correctly, SYSVOL and Group Policy work, and functional levels are raised only after unsupported older controllers are retired. This tests In-place AD DS forest upgrade and SYSVOL prerequisite checks, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: Each migrated IIS site responds under the intended hostname and TLS identity with required authentication and data connectivity after controlled cutover. Situation: A web farm cutover succeeds for the root page but a legacy managed-code module fails because its required runtime was not installed.

Users can access permitted printers or RDS desktops on supported target servers while incompatible drivers and licensing problems are explicitly resolved. This tests Print and Remote Desktop Services host migration, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: Each migrated IIS site responds under the intended hostname and TLS identity with required authentication and data connectivity after controlled cutover. Situation: A web farm cutover succeeds for the root page but a legacy managed-code module fails because its required runtime was not installed.

An assessment reports source inventory and application dependencies with justified target sizes and clearly documented incompatibilities before any replication begins. This tests Azure Migrate discovery and dependency assessment, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: Each migrated IIS site responds under the intended hostname and TLS identity with required authentication and data connectivity after controlled cutover. Situation: A web farm cutover succeeds for the root page but a legacy managed-code module fails because its required runtime was not installed.

The correct role-specific baseline is applied with measurable compliance and approved exceptions; business services and remote management remain functional. This tests OSConfig role-based Windows Server 2025 baseline, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: Known weak or banned passwords are rejected at change time and sensitive privileged identities use the intended protections without silent account lockout. Situation: An administrator adds a legacy service account to Protected Users and then discovers an application depends on an authentication method restricted for that group.

Approved Kerberos authentication succeeds on designated hosts while disallowed NTLM or privileged sign-ins are logged and rejected under the tested policy. This tests NTLM audit and authentication policy silo hardening, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: Known weak or banned passwords are rejected at change time and sensitive privileged identities use the intended protections without silent account lockout. Situation: An administrator adds a legacy service account to Protected Users and then discovers an application depends on an authentication method restricted for that group.

The required application port is reachable only from permitted subnets while unapproved inbound administrative traffic is denied and logged. This tests Windows Defender Firewall profile and inbound exposure, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: Known weak or banned passwords are rejected at change time and sensitive privileged identities use the intended protections without silent account lockout. Situation: An administrator adds a legacy service account to Protected Users and then discovers an application depends on an authentication method restricted for that group.

Updates install successfully from the approved source and domain clients maintain reliable clock synchronization for authentication and event correlation. This tests Windows Update and Time Service troubleshooting, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The affected server boots or extension provisions with required services verified, and the original failure has a documented cause and safe rollback. Situation: An Azure Arc machine is online but its custom script extension fails because the service identity cannot reach the configured package endpoint.

Administrators can trace the named incident to source logs and predictive trends with dates, without treating a forecast as proof that hardware has already failed. This tests Windows Admin Center event logs and System Insights, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The affected server boots or extension provisions with required services verified, and the original failure has a documented cause and safe rollback. Situation: An Azure Arc machine is online but its custom script extension fails because the service identity cannot reach the configured package endpoint.

Affected domain controllers exchange expected directory updates without new replication errors and site convergence is verified after the fix. This tests AD replication topology and lingering errors, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The affected server boots or extension provisions with required services verified, and the original failure has a documented cause and safe rollback. Situation: An Azure Arc machine is online but its custom script extension fails because the service identity cannot reach the configured package endpoint.

Administrators can trace the named incident to source logs and predictive trends with dates, without treating a forecast as proof that hardware has already failed. This tests Windows Admin Center event logs and System Insights, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The required counters and events arrive with source identity and delay within the expected interval, and actionable thresholds notify the responsible team. Situation: A VM Insights workspace shows no dependency/performance map after rollout because the prerequisite extension or supported platform component is missing.

The expected hostname resolves to the approved address and connectivity to required service ports is verified from affected and unaffected locations. This tests Windows DNS and network connectivity troubleshooting, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The required counters and events arrive with source identity and delay within the expected interval, and actionable thresholds notify the responsible team. Situation: A VM Insights workspace shows no dependency/performance map after rollout because the prerequisite extension or supported platform component is missing.

The affected server boots or extension provisions with required services verified, and the original failure has a documented cause and safe rollback. This tests Boot, storage and Azure Arc extension failures, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The required counters and events arrive with source identity and delay within the expected interval, and actionable thresholds notify the responsible team. Situation: A VM Insights workspace shows no dependency/performance map after rollout because the prerequisite extension or supported platform component is missing.

Inspect RODC allowed and denied replication groups, cached password list, delegated local administration, replication sources, and site connectivity. This step is relevant to RODC password replication policy in branch offices but is not one of the complementary steps this case needs. The intended pair is: 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. and Review NIC/subnet NSG association, priority ordering, service tags, ASG references, effective security rules, and Network Watcher connectivity evidence. Situation: An application subnet permits HTTPS in its NSG but a network interface NSG denies the same traffic and an operator blames DNS.

The intended hybrid servers show healthy onboarding and actionable security findings without falsely treating a management registration alone as full threat protection. This step is relevant to Defender for Servers onboarding and Azure Arc posture but is not one of the complementary steps this case needs. The intended pair is: 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. and Review NIC/subnet NSG association, priority ordering, service tags, ASG references, effective security rules, and Network Watcher connectivity evidence. Situation: An application subnet permits HTTPS in its NSG but a network interface NSG denies the same traffic and an operator blames DNS.

Create tested connection security rules for domain isolation and required authenticated server-to-server IPsec, with planned exemptions for unmanaged systems. This step is relevant to Windows IPsec connection security and domain isolation but is not one of the complementary steps this case needs. The intended pair is: 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. and Review NIC/subnet NSG association, priority ordering, service tags, ASG references, effective security rules, and Network Watcher connectivity evidence. Situation: An application subnet permits HTTPS in its NSG but a network interface NSG denies the same traffic and an operator blames DNS.

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 would address Boot, storage and Azure Arc extension failures, not the controlling issue in this situation. A boot loader fault, an encrypted volume locked without a protector, and an Azure extension permission problem require different remedies despite a generic failure status. The targeted response is: Use Windows Admin Center, Windows Event Viewer and System Insights to correlate historical server events with predictive local capacity trends and configure practical administrative alerts. Situation: A storage forecast projects disk capacity exhaustion next month while the operations team labels the machine already failed with no current event evidence.

Select a supported AD Recycle Bin object restore for eligible accidental deletions or use Directory Services Restore Mode and system-state recovery for more extensive database damage, preserving directory consistency. This would address AD Recycle Bin versus DSRM directory recovery, not the controlling issue in this situation. AD Recycle Bin restores eligible deleted objects but does not replace a backup for destroyed AD databases; DSRM restores require careful replication and authoritative-restore decisions. The targeted response is: Use Windows Admin Center, Windows Event Viewer and System Insights to correlate historical server events with predictive local capacity trends and configure practical administrative alerts. Situation: A storage forecast projects disk capacity exhaustion next month while the operations team labels the machine already failed with no current event evidence.

Configure Azure Monitor Agent and appropriate data collection rules for Azure and Arc-connected Windows servers, enable VM Insights as supported, and use measured alerts with right scope. This would address Azure Monitor data collection rules and VM Insights, not the controlling issue in this situation. A data collection rule must be correctly associated with the source machine and destination; adding a Log Analytics workspace alone does not begin metric/log collection. The targeted response is: Use Windows Admin Center, Windows Event Viewer and System Insights to correlate historical server events with predictive local capacity trends and configure practical administrative alerts. Situation: A storage forecast projects disk capacity exhaustion next month while the operations team labels the machine already failed with no current event evidence.

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: An administrator restores a week-old domain controller backup and assumes every other DC should automatically accept its stale directory database as authoritative.

Review inbound/outbound replication partners, last success times, DNS and RPC reachability, Directory Service event IDs, and USN or lingering object warnings. This examines AD replication topology and lingering errors, 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: An administrator restores a week-old domain controller backup and assumes every other DC should automatically accept its stale directory database as authoritative.

Inspect event logs and recovery console outputs, boot configuration data, BitLocker recovery status, disk I/O errors, extension provisioning messages and Azure guest agent health. This examines Boot, storage and Azure Arc extension failures, 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: An administrator restores a week-old domain controller backup and assumes every other DC should automatically accept its stale directory database as authoritative.

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 examines Azure Files and Azure File Sync migration strategy, a different fault or management boundary. For this case the decisive evidence is: Inspect web application framework/runtime version, authentication, Windows-specific dependencies, on-premises database connections, environment settings and certificates. Situation: A simple ASP.NET website is considered for Azure App Service but its database remains behind a private network with no connectivity design.

Inspect required Windows base image version, container host compatibility, IIS module dependencies, service account rights, persistent volumes and image supply-chain provenance. This examines Container migration decision for IIS workloads, a different fault or management boundary. For this case the decisive evidence is: Inspect web application framework/runtime version, authentication, Windows-specific dependencies, on-premises database connections, environment settings and certificates. Situation: A simple ASP.NET website is considered for Azure App Service but its database remains behind a private network with no connectivity design.

Inspect forest trust health, DNS name resolution, user/group membership, SIDHistory privileges and auditing, ADMT compatibility, and application ACL references. This examines New AD forest restructuring with ADMT and SIDHistory, a different fault or management boundary. For this case the decisive evidence is: Inspect web application framework/runtime version, authentication, Windows-specific dependencies, on-premises database connections, environment settings and certificates. Situation: A simple ASP.NET website is considered for Azure App Service but its database remains behind a private network with no connectivity design.

Time-series evidence isolates the constrained resource and shows whether a tested change improves application throughput without creating another bottleneck. This tests Performance Monitor baseline and Data Collector Sets, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The expected hostname resolves to the approved address and connectivity to required service ports is verified from affected and unaffected locations. Situation: A domain member can connect to a database by IP address but not by FQDN after its DNS suffix search list changes.

A test Group Policy update reaches intended domain controllers and hybrid identity updates flow to Microsoft Entra ID with no unexplained failures. This tests SYSVOL DFSR and hybrid synchronization troubleshooting, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The expected hostname resolves to the approved address and connectivity to required service ports is verified from affected and unaffected locations. Situation: A domain member can connect to a database by IP address but not by FQDN after its DNS suffix search list changes.

The affected server boots or extension provisions with required services verified, and the original failure has a documented cause and safe rollback. This tests Boot, storage and Azure Arc extension failures, but does not demonstrate that the requested outcome is satisfied. The relevant acceptance test is: The expected hostname resolves to the approved address and connectivity to required service ports is verified from affected and unaffected locations. Situation: A domain member can connect to a database by IP address but not by FQDN after its DNS suffix search list changes.