How to create Resource group
You can use existing resource group but we recommend you to create new resource group so that to keep everything backed up separately by Revyz in one particular resource group.
Search for Resource group service

Click on Create

Select Subscription. Choose a subscription for which you have access to or according to your organisation policy.
Give Resource group name.
Choose the Region based on in which your Atlassian sites pinned to. For E.g. If your Atlassian site resides in US region then select US region.

Click on 'Review + create' and then create.
After creating resource group, Note down the created Resource group name for further reference.