gcloud organizations set-iam-policy

NAME
gcloud organizations set-iam-policy - set IAM policy for an organization
SYNOPSIS
gcloud organizations set-iam-policy ORGANIZATION_ID POLICY_FILE [GCLOUD_WIDE_FLAG …]
DESCRIPTION
Given an organization ID and a file encoded in JSON or YAML that contains the IAM policy, this command will set the IAM policy for that organization.
EXAMPLES
The following command reads an IAM policy defined in a JSON file policy.json and sets it for an organization with the ID 123456789: 
gcloud organizations set-iam-policy 123456789 policy.json

The following command reads an IAM policy defined in a JSON file policy.json and sets it for the organization associated with the domain example.com: 

gcloud organizations set-iam-policy example.com policy.json
POSITIONAL ARGUMENTS
ORGANIZATION_ID
ID or domain for the organization whose IAM policy you want to set.
POLICY_FILE
JSON or YAML file containing the IAM policy.
GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES
These variants are also available: 
gcloud alpha organizations set-iam-policy
 
gcloud beta organizations set-iam-policy