Hello @AdamTyler-3590 Thank you for contacting through Microsoft Q&A community platform. Happy to assist!
From the details you provided, I understand that you want to know "the difference between a "replication policy" and a "replication group" when setting up azure site recovery.
A replication policy is a set of rules that define how replication should be performed for a group of virtual machines. It includes settings such as the frequency of replication, the retention period for recovery points, and the number of recovery points to keep. You can create and manage replication policies in the Azure Site Recovery vault. Reference doc link - https://learn.microsoft.com/en-us/azure/site-recovery/azure-to-azure-how-to-enable-replication
A replication group is a collection of virtual machines that are replicated together and have shared crash-consistent and app-consistent recovery points at failover. Multi-VM consistency impacts workload performance and should only be used for VMs running workloads that need consistency across all machines. You can create and manage replication groups in the Azure portal. Refer to the doc here - https://learn.microsoft.com/en-us/azure/site-recovery/azure-to-azure-common-questions#multi-vm-consistency
When you set up replication for a pair of machines, you are prompted to create a replication policy and a replication group. The replication policy defines the replication settings for the virtual machines, while the replication group defines the consistency point objective (CPO) for the group of virtual machines.
Once you have set up replication for a pair of machines, you can modify the replication policy and replication group settings in the Azure portal. To modify the replication policy, go to the Replication Policies tab in the Azure Site Recovery vault. To modify the replication group, go to the Replication Groups tab in the Azure portal.
I hope this helps! Let us know if you have any other questions.
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