Microsoft Updated AZ-800 Exam Questions and Answers by reya

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do not use Failover Clustering for DHCP here, and you do not create extra 25% scopes; those are split-scope practices superseded by DHCP failover.

In the Administering Windows Server Hybrid Core Infrastructure materials (AZ-800), Microsoft explains that Group Managed Service Accounts (gMSAs) are designed for services running on multiple servers and “provide automatic password management, simplified SPN management, and the ability to delegate the management to other administrators.” The guidance further states that before you can create any gMSA, “the domain must have a KDS root key so that the Key Distribution Service can generate and rotate strong, unique passwords for gMSAs on a schedule.” After the KDS root key is created, “use New-ADServiceAccount to create the gMSA and grant the computers (e.g., web servers) permission to retrieve the account password.” For IIS, the course notes specify that a gMSA can be used for app pools: “Configure the IIS application pool identity to a custom account and specify the gMSA name (ending with ‘$’) without a password; the password is managed automatically by AD and rotates by policy (for example, every 30 days).”

Mapping these requirements to the scenario: Webapp1 runs on WEB1 and WEB2 and must use the same service account with an automatic 30-day password change. Therefore, the correct sequence is: create the KDS root key, create the gMSA, and then set the IIS application pool to run under that account. This fulfills the security requirement while allowing both web servers to share the same, automatically-rotated credentials.

The Administering Windows Server Hybrid Core Infrastructure materials explain that Azure AD Password Protection for on-premises AD uses two components: the DC agent and the proxy service. The DC agent is installed on every domain controller because it “intercepts password set/change operations locally on the DC and evaluates them against the forbidden-password policy.” The guidance further states that to ensure consistent enforcement “the DC agent should be deployed to all DCs in the forest, since password changes may occur on any DC.” The proxy service is installed on member servers (not necessarily DCs) and “relays policy downloads and telemetry to Azure AD on behalf of DCs,” which satisfies environments where “domain controllers must not directly contact Internet endpoints.” Finally, configuration of the global and custom banned password lists is performed in Azure AD, where administrators “define tenant-wide custom banned terms; DCs obtain the policy via the proxy and cache it for local enforcement.”

Given Fabrikam’s requirement to prevent DCs from accessing the Internet, the proxy must run on non-DC servers (VM1 and VM2). To guarantee enforcement wherever a password is changed, the DC agent must be on all domain controllers. The custom banned password list is configured in the Azure AD tenant and then distributed to on-premises DCs via the proxy.

In the NPS/RADIUS section of Administering Windows Server Hybrid Core Infrastructure, a RADIUS client is defined as a network access server (NAS) such as a VPN server, wireless AP, or switch. The guide states: “Each VPN server that forwards connection requests to NPS must be configured as a RADIUS client.” User counts are irrelevant to the number of RADIUS clients; the determining factor is the number of NAS devices that send RADIUS messages to NPS. The table shows Boston: 2 VPN servers, Dallas: 2, Seattle: 4—for a total of 8 VPN servers. Therefore, to enforce policies for all remote connections through NPS1, you must add each of the eight VPN servers as a RADIUS client. Options reflecting user totals (180/188) are incorrect because users are authenticated via the NAS, not directly configured as clients in NPS.