Use DeleteGroupPolicy with an Amazon SDK or CLI

    /// <summary>
    /// Delete an IAM policy associated with an IAM group.
    /// </summary>
    /// <param name="groupName">The name of the IAM group associated with the
    /// policy.</param>
    /// <param name="policyName">The name of the policy to delete.</param>
    /// <returns>A Boolean value indicating the success of the action.</returns>
    public async Task<bool> DeleteGroupPolicyAsync(string groupName, string policyName)
    {
        var request = new DeleteGroupPolicyRequest()
        {
            GroupName = groupName,
            PolicyName = policyName,
        };

        var response = await _IAMService.DeleteGroupPolicyAsync(request);
        return response.HttpStatusCode == System.Net.HttpStatusCode.OK;
    }

To delete a policy from an IAM group

The following delete-group-policy command deletes the policy named ExamplePolicy from the group named Admins.

aws iam delete-group-policy \
    --group-name Admins \
    --policy-name ExamplePolicy

This command produces no output.

To see the policies attached to a group, use the list-group-policies command.

For more information, see Managing IAM policies in the Amazon IAM User Guide.

Example 1: This example removes the inline policy named TesterPolicy from the IAM group Testers. The users in that group immediately lose the permissions defined in that policy.

Remove-IAMGroupPolicy -GroupName Testers -PolicyName TestPolicy