| title | include file |
|---|---|
| description | include file |
| services | site-recovery |
| author | ankitaduttaMSFT |
| ms.service | azure-site-recovery |
| ms.topic | include |
| ms.date | 08/29/2025 |
| ms.author | ankitadutta |
| ms.custom | include file |
Configuration and process server requirements
| Component | Requirement |
|---|---|
| CPU cores | 8 |
| RAM | 16 GB |
| Number of disks | 3, including the OS disk, process server cache disk, and retention drive for failback |
| Free disk space (process server cache) | 600 GB |
| Free disk space (retention disk) | 600 GB |
|
| Component | Requirement |
|---|---|
| Operating system | Windows Server 2012 R2 Windows Server 2016 Note: Windows Server 2022 is only supported for modernized architecture. As classic architecture is under deprecation, no new feature supports will be added to it. We suggest you use the modernized architecture. |
| Operating system locale | English (en-*) |
| Windows Server roles | Don't enable these roles: - Active Directory Domain Services - Internet Information Services - Hyper-V |
| Group policies | Don't enable these group policies: - Prevent access to the command prompt. - Prevent access to registry editing tools. - Trust logic for file attachments. - Turn on Script Execution. Learn more |
| IIS | - No pre-existing default website - No pre-existing website/application listening on port 443 - Enable anonymous authentication - Enable FastCGI setting |
| FIPS (Federal Information Processing Standards) | Don't enable FIPS mode |
|
| Component | Requirement |
|---|---|
| IP address type | Static |
| Ports | 443 (Control channel orchestration) 9443 (Data transport) |
| NIC type | VMXNET3 (if the configuration server is a VMware VM) |
| Internet access (the server needs access to the following URLs, directly or via proxy):| *.backup.windowsazure.com | Used for replicated data transfer and coordination *.blob.core.windows.net | Used to access storage account that stores replicated data. You can provide the specific URL of your cache storage account. *.hypervrecoverymanager.windowsazure.com | Used for replication management operations and coordination https://login.microsoftonline.com | Used for replication management operations and coordination time.nist.gov | Used to check time synchronization between system and global time time.windows.com | Used to check time synchronization between system and global time |
- *.management.azure.com
- https://secure.aadcdn.microsoftonline-p.com
- https://login.live.com
- https://graph.windows.net
- https://login.windows.net
- *.services.visualstudio.com (Optional)
- https://www.live.com
- https://www.microsoft.com
In a few regions, the download might be redirected to the CDN URL. Ensure that the CDN URL is also approved, if necessary. |
Note
If you have private links connectivity to Site Recovery vault, you don't need any additional internet access for the Configuration Server. An exception to this is while setting up the CS machine using OVA template, you'll need access to following URLs over and above private link access - https://www.live.com and https://www.microsoft.com. If you don't wish to allow access to these URLs, please set up the CS using Unified Installer.
Note
While setting up private endpoints to protect VMware and physical machines, you'll need to install MySQL on the configuration server manually. Follow the steps here to perform the manual installation.
| Component | Requirement |
|---|---|
| VMware vSphere PowerCLI | Not required for versions 9.14 and higher |
| MYSQL | MySQL should be installed. You can install manually, or Site Recovery can install it. (Refer to configure settings for more information) |
|
Note
Upgrading MySQL on the configuration server isn't supported.
The following table summarizes capacity requirements for the configuration server. If you're replicating multiple VMware VMs, review the capacity planning considerations and run the Azure Site Recovery Deployment Planner tool.
| CPU | Memory | Cache disk | Data change rate | Replicated machines |
|---|---|---|---|---|
| 8 vCPUs 2 sockets * 4 cores @ 2.5 GHz |
16 GB | 300 GB | 500 GB or less | < 100 machines |
| 12 vCPUs 2 socks * 6 cores @ 2.5 GHz |
18 GB | 600 GB | 500 GB-1 TB | 100 to 150 machines |
| 16 vCPUs 2 socks * 8 cores @ 2.5 GHz |
32 GB | 1 TB | 1-2 TB | 150 -200 machines |
|