On-Premises to Azure & Hybrid Cloud
Migration for Indian Enterprises
Move VMware, Hyper-V, and physical servers to Azure — or build a hybrid cloud with on-prem HPE/Dell hardware and Azure connectivity. Landing zone, security hardening, and Indian compliance built in.
Why Indian Enterprises Are Moving to Cloud
On-premises data centres carry massive capital expenditure — server hardware every 5 years, storage expansion, UPS, cooling, rack space, and 24/7 facility staff. A single hardware failure can take critical workloads offline for hours while you wait for vendor support.
Scaling on-prem means procurement cycles of 8-12 weeks. Need more compute for a seasonal spike? You either over-provision (wasting money year-round) or under-provision (losing business during peak). Azure lets you scale in minutes and pay only for what you use.
Disaster recovery with on-prem infrastructure requires a secondary site with duplicate hardware — doubling your capital investment. Azure Site Recovery provides enterprise DR at a fraction of the cost, with automated failover and RTO under 15 minutes.
Discovery & Assessment with Azure Migrate
Server Discovery
Azure Migrate appliance discovers all VMs in your VMware vCenter or Hyper-V environment. Collects CPU, memory, disk, and network utilisation data over 30 days. Identifies all running services and dependencies.
Dependency Mapping
Agentless dependency analysis shows which servers communicate with each other. This prevents migration failures caused by splitting dependent servers across different migration waves. Visualise application tiers and group servers for batch migration.
Cost & Readiness Assessment
Azure Migrate recommends right-sized Azure VM SKUs based on actual utilisation (not provisioned capacity). Calculates monthly Azure cost estimate with Reserved Instances and Azure Hybrid Benefit. Flags servers that need OS upgrade or driver fixes before migration.
Migration Methods — Choose the Right Approach
Most enterprises use rehost for 70-80% of workloads and selectively replatform databases and web apps.
| Method | What It Does | Risk | Cost Savings | Best For |
|---|---|---|---|---|
| Rehost (Lift & Shift) | Move VMs as-is to Azure VMs | Lowest | Moderate (right-sizing) | Most workloads, quick wins |
| Replatform | Move to Azure PaaS (SQL, App Service) | Moderate | High (no OS/VM mgmt) | Databases, web apps |
| Refactor | Rebuild as cloud-native (containers, serverless) | Highest | Highest (long-term) | Apps needing scale/agility |
| Retain (Hybrid) | Keep on-prem, connect to Azure | None | Minimal | Legacy apps, regulatory holds |
Azure Landing Zone — Foundation First
Before migrating a single server, we set up your Azure Landing Zone — a well-architected foundation that includes identity, networking, security, governance, and cost management. Skipping this step leads to security gaps, ungoverned spend, and painful re-architecture later.
We follow Microsoft's Cloud Adoption Framework (CAF) and Well-Architected Framework (WAF) to design a landing zone that scales with your organisation. Management groups, subscriptions, resource groups, RBAC, and policy assignments — all configured before the first workload lands.
Hub-spoke network topology with Azure Firewall or FortiGate NVA at the hub provides centralised traffic inspection, DNS resolution, and connectivity to on-premises via VPN or ExpressRoute. Spoke VNETs for each workload tier are isolated and governed by NSGs and Azure Policy.
Landing Zone Components
- Azure AD tenant with Conditional Access policies
- Management group hierarchy (Platform / Landing Zones / Sandbox)
- Hub-spoke VNET topology with centralised firewall
- Azure Firewall or FortiGate NVA for traffic inspection
- VPN Gateway or ExpressRoute for on-prem connectivity
- Azure Policy assignments (CIS benchmark, tagging, region lock)
- Microsoft Defender for Cloud (CSPM + CWP)
- Azure Monitor + Log Analytics workspace
- Cost Management budgets and alerts
- Azure Key Vault for secrets and certificates
Network Connectivity — On-Prem to Azure
Site-to-Site VPN
Azure VPN Gateway creates encrypted IPsec tunnels over your existing internet connection. Suitable for most workloads. We configure active-active VPN gateways with BGP for automatic failover. Works with FortiGate, Cisco, or any IPsec-capable on-prem device.
- Up to 10 Gbps aggregate throughput (VpnGw5)
- BGP support for dynamic routing
- Active-active for high availability
- Lower cost — uses existing internet links
Azure ExpressRoute
Dedicated private connection to Azure via Indian telco partners. Traffic does not traverse the public internet. Predictable latency, higher bandwidth, and SLA-backed connectivity. Required for latency-sensitive workloads and BFSI regulatory compliance.
- 50 Mbps to 100 Gbps circuit options
- Indian partners: Tata, Airtel, BSNL
- Private peering for Azure VNETs
- Microsoft peering for M365 and Dynamics
Azure Security — Defence in Depth
Network Security
NSGs for micro-segmentation. Azure Firewall or FortiGate NVA for north-south inspection. DDoS Protection Standard. Private Endpoints for PaaS services (no public IP exposure). Web Application Firewall (WAF) for internet-facing apps.
Microsoft Defender for Cloud
Cloud Security Posture Management (CSPM) scores your environment against CIS and NIST benchmarks. Cloud Workload Protection (CWP) for servers, databases, containers, and storage. Regulatory compliance dashboard for RBI, ISO 27001, and PCI DSS.
Identity & Access
Azure AD Conditional Access for MFA enforcement, device compliance, and location-based access. Privileged Identity Management (PIM) for just-in-time admin access. Azure RBAC for least-privilege role assignments across all resources.
Hybrid Cloud with HPE & Dell Hardware
Not everything goes to the cloud. For workloads that must stay on-premises (regulatory, latency, data sovereignty), we provide enterprise-grade hardware with Azure hybrid integration.
HPE — ProLiant & Storage
- HPE ProLiant DL360/DL380: Workhorse rack servers for virtualisation, databases, and application hosting
- HPE Nimble / Primera: Flash storage arrays with predictive analytics for on-prem data tiers
- HPE GreenLake: Cloud-like consumption model for on-prem infrastructure — pay per use
- Azure Stack HCI: Runs on HPE hardware with Azure management
Dell — PowerEdge & PowerStore
- Dell PowerEdge R750/R760: High-density rack servers with GPU support for AI/ML workloads
- Dell PowerStore: Unified storage (block + file) with intelligent data placement and dedup
- Dell APEX: As-a-Service infrastructure with cloud-like flexibility
- Azure Arc: Manage Dell servers with Azure Policy and Monitor
Ogma's Cloud Migration Process
Discovery & Assessment
Deploy Azure Migrate appliance. Discover all servers, databases, and web apps. Collect 30-day performance data. Map dependencies. Generate right-sized Azure cost estimates with Reserved Instance and Hybrid Benefit pricing.
Landing Zone Setup
Configure Azure tenant, management groups, subscriptions. Deploy hub-spoke VNET with Azure Firewall or FortiGate NVA. Establish VPN/ExpressRoute connectivity. Configure Azure AD, Conditional Access, RBAC, and Azure Policy baselines.
Pilot Migration
Migrate 5-10 non-critical servers as pilot. Validate replication, cutover process, network connectivity, DNS resolution, and application functionality in Azure. Document and resolve issues before full migration.
Wave Migration
Migrate in waves grouped by application dependency. Start replication, monitor sync status, and perform cutover during planned windows. Each wave validated before the next begins. Typically 10-30 servers per wave with 1-week validation gaps.
Security Hardening
Enable Microsoft Defender for Cloud. Configure NSGs, Azure Firewall rules, and Private Endpoints. Set up Azure Monitor alerts, Log Analytics, and diagnostic settings. Configure backup policies (Azure Backup) and DR (Azure Site Recovery) for migrated workloads.
Optimise & Handover
Right-size VMs based on post-migration utilisation data. Configure Azure Cost Management budgets and alerts. Apply Reserved Instances for steady-state workloads. Deliver operational runbook. Train your team on Azure portal, monitoring, and incident response. 30-day post-migration support.
Why Ogma for Cloud Migration
Full Stack — Cloud + Hardware + Security
Ogma is the rare partner that handles Azure migration, on-premises HPE/Dell hardware for hybrid, FortiGate network security, CrowdStrike endpoint protection, and M365 deployment. One vendor for your entire IT transformation.
Security-First Approach
As a cybersecurity company, we build security into every migration. Landing zone includes Defender for Cloud, NSGs, Azure Firewall, Conditional Access, and compliance baselines from day one — not as an afterthought.
India Compliance Expertise
We configure Azure tenants for Indian regulatory requirements — RBI data localisation, DPDPA data processing, CERT-In audit logging, and SEBI CSCRF compliance. Gurugram-based team working in IST with on-site availability for Delhi NCR.
Frequently Asked Questions
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