Multi-Region Active Directory Authentication with AWS Managed Microsoft AD and AD Connector
A multinational corporation is migrating its on-premises Active Directory to AWS. The company requires a solution that supports multi-region authentication for thousands of users and integrates with existing on-premises Active Directory for seamless SSO. The solution must be highly available and provide low-latency authentication. Which TWO AWS services should be combined to meet these requirements? (Choose two.)
Quick Answer
The correct answer is to combine AWS Managed Microsoft AD with AD Connector. AWS Managed Microsoft AD allows you to deploy fully managed Active Directory in multiple AWS regions, creating a mesh of domain controllers that provide low-latency authentication for users across geographic boundaries. AD Connector then acts as a proxy to bridge these AWS-based directories back to your existing on-premises Active Directory, enabling seamless SSO without requiring complex trust relationships or directory synchronization. On the SAP-C02 exam, this scenario tests your understanding of hybrid identity architectures under high-availability constraints; a common trap is selecting AWS SSO or Cognito, but those handle external federation or customer identities, not core multi-region AD authentication for internal users. Remember the key pairing: Managed AD for the multi-region footprint, AD Connector for the on-premises bridge. Memory tip: think “Managed for the map, Connector for the connection.”
⚠ Common exam trap
Watch out — candidates often confuse AWS Single Sign-On (SSO) as a standalone identity provider, but it requires an underlying directory service (like AWS Managed Microsoft AD or AD Connector) to authenticate against on-premises Active Directory, making it an incomplete solution on its own.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AD Connector
AD Connector (Option C) is correct because it acts as a proxy to redirect authentication requests from AWS services to your on-premises Active Directory without caching credentials or requiring directory synchronization, enabling seamless SSO for users. AWS Managed Microsoft AD (Option E) is correct because it provides a highly available, fully managed Active Directory in the AWS cloud that can be extended to multiple regions via trust relationships, supporting low-latency authentication for thousands of users across regions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon Cognito
Why it's wrong here
Amazon Cognito is for external identity providers and user pools, not for on-premises AD integration.
- ✗
AWS Direct Connect
Why it's wrong here
Direct Connect provides dedicated network connection but does not handle authentication or SSO.
- ✓
AD Connector
Why this is correct
AD Connector connects AWS services to on-premises AD, enabling SSO and authentication.
- ✗
AWS Single Sign-On (SSO)
Why it's wrong here
AWS SSO is a separate SSO service that can integrate with AD, but it is not required when using AD Connector and IAM.
- ✓
AWS Managed Microsoft AD
Why this is correct
AWS Managed Microsoft AD provides a fully managed Active Directory in multiple regions, supports multi-region authentication.
Go deeper
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Same concept, more angles
2 more ways this is tested on SAP-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A multinational corporation is migrating its on-premises Active Directory (AD) to AWS Managed Microsoft AD. The company has a hub-and-spoke VPC topology with a central transit gateway. The AD domain controllers must be deployed in two different AWS Regions for disaster recovery. The corporate security policy requires that all AD traffic between Regions must traverse the transit gateway and be inspected by a third-party firewall appliance deployed in the inspection VPC. Which architecture meets these requirements?
medium- A.Deploy AD in two Regions and use a VPN connection between the VPCs to replicate data.
- B.Deploy a single AD domain in one Region and use AD replication over a VPC peering connection to a second Region.
- ✓ C.Deploy AD in two Regions, attach both VPCs to the transit gateway, and enable cross-Region transit gateway peering. Use route tables to direct AD traffic through the inspection VPC.
- D.Deploy AD in two Regions, attach both VPCs to a transit gateway in the primary Region, and use a transit gateway inter-Region peering attachment. Configure route tables to force traffic through the inspection VPC in the primary Region.
Why C: It uses cross-Region transit gateway peering, which allows VPCs in different Regions to communicate through their respective transit gateways. By attaching both VPCs to their local transit gateways and peering those gateways, you can configure route tables to force AD traffic through the inspection VPC in one Region, satisfying the firewall inspection requirement. Option D is incorrect because you cannot attach a VPC in a secondary Region to a transit gateway in the primary Region; transit gateway attachments are regional.
Variation 2. A multinational corporation is migrating its on-premises Active Directory to AWS Managed Microsoft AD. The company has multiple VPCs in different AWS Regions, and all VPCs must be able to authenticate against the same directory. The directory must be highly available and support automatic failover. What is the MOST operationally efficient solution?
hard- A.Use AWS Directory Service AD Connector in each VPC and point to an on-premises Active Directory.
- ✓ B.Deploy AWS Managed Microsoft AD in each Region using multi-Region replication. Configure the directory as a global directory.
- C.Deploy AWS Managed Microsoft AD in one Region. Create VPC peering connections to all other VPCs.
- D.Deploy AWS Managed Microsoft AD in one Region. Configure VPN connections from each VPC to this directory.
Why B: AWS Managed Microsoft AD with multi-Region replication provides a single global directory that spans multiple Regions, enabling automatic failover and high availability. This is the most operationally efficient solution because it eliminates the need for complex networking (VPC peering or VPNs) and allows all VPCs to authenticate against the same directory natively, with replication handled by AWS.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SAP-C02 exam.