Deploy Azure-hosted domain controllers across an availability set

Frame this document as a source-led configuration and assurance check: Deploy Azure-hosted domain controllers across an availability set. Only the official source and traced locations below supply facts. Confirm applicability before acting.

Source fact:

The official Install Active Directory Domain Services on an Azure virtual machine from Microsoft supports the following bounded statements:

• AD DS can run on Azure virtual machines in the same manner as many on-premises deployments. The research record locates this support at Opening overview.
• The documented example deploys two domain controllers in an Azure availability set using portal and CLI methods. The research record locates this support at Opening overview.

Do not import neighboring assumptions into the source record. The supported task is a scoped comparison involving forests, domains, controllers, directory partitions, trusts, sites, replication links, service accounts, and delegated roles and the conditions the source actually describes.

What the source does not establish

The page is a deployment example, not a complete production architecture or disaster-recovery design. No current deployment state or change approval follows from the source alone. Validate Windows DNS, time synchronization, network reachability, PKI, backups, virtualization safeguards, and privileged identity, and treat examples or options as conditional inputs rather than defaults.

Applicability questions

• For source statement 1 at Opening overview, which observable configuration, record, or test can confirm applicability here?
• For source statement 2 at Opening overview, which observable configuration, record, or test can confirm applicability here?
• What inventory proves which parts of forests, domains, controllers, directory partitions, trusts, sites, replication links, service accounts, and delegated roles are in and out of scope?
• Which condition in Windows DNS, time synchronization, network reachability, PKI, backups, virtualization safeguards, and privileged identity must be healthy before evidence is trustworthy?
• What result would disprove the working assumption and return the issue to the owner?

DSE recommendation:

DSE recommends using the cited source as the evidence anchor for this decision. Use a two-person review for the source interpretation and the resulting operational decision. Record the source location, examined part of forests, domains, controllers, directory partitions, trusts, sites, replication links, service accounts, and delegated roles, observed and expected states, owner, and reason for deviation.

An implementation decision needs an owner, approved window, prechecks, observable outcome, stop authority, and rollback path. Validate Windows DNS, time synchronization, network reachability, PKI, backups, virtualization safeguards, and privileged identity before and after the test, and store only sanitized operational evidence.

Verification and evidence

Evidence should let another reviewer reproduce this decision. Retain observations beside the traced locations Opening overview; Opening overview. Favor directory and policy exports, replication and locator tests, event logs, trust state, role ownership, and controlled authentication tests, linked to stable identifiers, time, and operator.

Close the review only when the evidence, exception handling, resulting action, and after-state are linked. Schedule a new review after material technical, organizational, incident, or source changes; today’s observation is not a continuing guarantee.

Official references

• Install Active Directory Domain Services on an Azure virtual machine — Microsoft