AZ-800 Exam Dumps : Administering Windows Server Hybrid Core Infrastructure

In the Administering Windows Server Hybrid Core Infrastructure materials (hybrid security and IaaS management), Just-In-Time (JIT) VM access from Microsoft Defender for Cloud is the prescribed way to require approval-based, time-bound Remote Desktop access to Azure VMs. The guide explains that JIT “locks down inbound traffic to management ports (for example, TCP/3389) and opens them only on request, for a limited time and only from approved source IPs.” Administrators request access; upon approval, Defender for Cloud creates a temporary NSG rule that expires automatically—you specify the maximum allowed window (e.g., 2 hours) and the ports. This matches the requirement: “Ensure that server administrators request approval before they can establish a Remote Desktop connection to an Azure virtual machine. If the request is approved, the connection must be established within two hours.” Alternatives don’t meet this: PIM governs Azure roles, not VM RDP port exposure; Azure Bastion provides secure RDP/SSH over TLS without public IPs but doesn’t provide approval/time-boxed gating; the Remote Desktop extension is for classic Cloud Services and not for policy-driven approval windows. JIT is the least-privilege, policy-enforced solution aligned with the exam’s hybrid security objectives.

In Administering Windows Server Hybrid Core Infrastructure, Microsoft states that high availability for DHCP on Windows Server is achieved by using DHCP failover rather than the legacy split-scope (80/20) model. The guidance explains that DHCP failover “synchronizes lease data between two DHCP servers and can be configured in Load Balance or Hot Standby mode on a per-scope basis,” and that you enable it on each DHCP scope to create a partner relationship that automatically replicates scope configuration and active leases. This meets the requirement to keep address assignment available if one DHCP server is down.

The same materials further note that DHCP broadcasts do not traverse routers; therefore, when the partner server is reachable across a routed boundary (another site/subnet), you must configure the router as a DHCP relay (IP helper) to forward DHCPDISCOVER messages to the remote DHCP server(s). The text emphasizes: “When clients and DHCP servers are on different subnets, configure a relay agent on the router to forward requests to the DHCP server IP addresses.”

Applying this to Fabrikam: create DHCP failover between DHCP1 (Scope1) and DHCP2 (Scope2) (E) and configure the routers in New York and Seattle as DHCP relays that forward to both DHCP servers (B). You do not use Failover Clustering for DHCP here, and you do not create extra 25% scopes; those are split-scope practices superseded by DHCP failover.

Step-by-Step Guide: Seizing/Transferring the Schema Master Role to DC2

✅ Step 1: Log in to DC2

Use an account that is a member of the Schema Admins, Enterprise Admins, and Domain Admins groups.

✅ Step 2: Register the Schema Snap-in

The Schema snap-in is not loaded by default.

Open Command Prompt as Administrator.

Type the following command to register the schema management DLL:

powershell

Copy

regsvr32 schmmgmt.dll

✅ Step 3: Open MMC (Microsoft Management Console)

Press Windows + R, type mmc, and hit Enter.

In MMC, go to File > Add/Remove Snap-in.

Select Active Directory Schema, then click Add > OK.

✅ Step 4: Connect to DC2

In the Active Directory Schema console, right-click Active Directory Schema and select Change Active Directory Domain Controller.

In the dialog box, select DC2 and click OK.

This will connect the console to DC2.

✅ Step 5: Transfer the Schema Master Role

Right-click Active Directory Schema again and select Operations Master.

In the Change Schema Master dialog box, confirm that DC2 is shown as the target.

Click the Change button to transfer the Schema Master role to DC2.

Click Yes when prompted to confirm the transfer.

✅ Step 6: Verify the Transfer

In the same dialog box, ensure that DC2 is now listed as the Schema Master.

Optionally, run the following command in PowerShell to verify:

netdom query fsmo

The Schema Master should now be DC2.