AEM as a Cloud Service migration

Treat migration as a change in operating model

Moving AEM to a cloud service is more than transferring content to another host. Existing code, repository usage, integrations and release practices may depend on assumptions that need to change. Emerge assesses those dependencies before setting a cutover date, so the migration plan reflects the actual estate rather than a generic sequence of exports and imports.

The first decision is the target service and scope. We establish which sites, assets, environments and integrations are moving, which remain operational elsewhere and what publishing continuity means for the business. The plan distinguishes code deployment, content transfer and traffic routing because each has different validation and recovery requirements.

Build a repository and dependency inventory

We examine content structure, component usage, templates, workflows, assets and custom extensions. The inventory also includes scheduled work, external services, authentication and deployment configuration. Dependencies that are rarely used still matter if they support a critical annual campaign or a sensitive customer journey.

Each item is classified for retention, remediation, replacement or retirement. The team records the business behaviour it supports before deciding whether the existing implementation should survive. This prevents obsolete code from being migrated merely because it is present, while protecting useful functionality that may not be obvious from a repository scan.

Adobe’s migration guidance and available assessment tools inform the readiness review. Their findings are translated into an actionable backlog with owners and test evidence. A tool report is valuable input, but it does not replace a decision about how the organisation will publish and operate the migrated experience.

Prove component and integration compatibility early

A representative slice contains the difficult patterns: a complex page, shared content, a localised variant, an authenticated path and an external data dependency where applicable. We validate those patterns in the target environment before migrating the easy pages at scale.

Custom code is reviewed against the target service’s deployment and runtime model. We test how configuration is supplied, how external calls are made and what happens when a dependency is slow or unavailable. Where a legacy approach no longer fits, the replacement is judged against the required behaviour rather than superficial code similarity.

The authoring experience is part of compatibility. A component that renders publicly but cannot be previewed or edited reliably is not ready. Editors exercise the same tasks they perform in the current estate and record the differences that require training or process changes.

Rehearse content and asset transfer

The migration map preserves relationships between pages, assets, taxonomy and language variants. We define which identifiers can remain stable and how references are transformed when they cannot. File counts and page counts are useful checks, but they do not establish that a page still points to the right media or localised counterpart.

A rehearsal measures transfer behaviour and identifies the content changes that can occur between the initial copy and final cutover. The operating plan defines an editorial freeze, a delta transfer or another controlled method appropriate to the estate. Authors need a clear rule about where to work during the transition.

We also validate asset metadata, renditions, accessibility descriptions and publication state. An asset that transferred successfully may still be missing from the public path or available to the wrong audience.

Protect URLs and transactional boundaries

The URL inventory records current routes, canonicals, redirects, sitemaps and high-value conversion destinations. Each route receives a target or an explicit retention decision. Redirects are page-specific where possible and tested for loops, chains and query preservation.

Forms, booking links, authenticated routes and callbacks receive separate treatment. A public content redirect must not intercept an operational request or invalidate an issued link. The migration test pack follows those journeys through their receiving systems using controlled fixtures and approved testing methods.

Performance and accessibility are compared on representative pages before traffic moves. The target architecture must support both the expected visitor load and the publishing workflow, including cache invalidation after a content change.

Release with evidence and a usable recovery plan

The cutover checklist identifies the code version, content state, domain configuration and people authorised to make the release decision. Acceptance includes author tasks, content relationships, public routes, integrations and conversion paths. The rollback plan states what can be reverted directly and what needs reconciliation if authors or customers have created new state after cutover.

Post-release checks verify the live site rather than relying only on deployment status. The team reviews publishing, errors, redirects and key customer journeys at agreed checkpoints. Emerge hands over the readiness assessment, migration mappings, rehearsal receipts, operating instructions and remaining improvement backlog. The migration is complete when the new estate can be published, used and supported with confidence.