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Yes, it’s possible to update existing resource by CFN. What you need is to import that resource first and then update by CFN -> https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/resource-import-existing-stack.html
answered 10 months ago
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Hello, Above information is to import AWS resources, but in this case I have the cloudformation code that creates: Global documentdb cluster (AWS::DocDB::DBCluster), instance db (AWS::DocDB::DBInstance ) , now I want to add the code to "add another region" in my cluster. Cloudformation documentation does not have information about add regions in documentdb clusters.