It's possible if you become the Delegated Admin for that second Intune account. If you are a cloud essentials partner, you can enable your Intune account to allow you to send Delegated Admin Offers to your customers. Once they accept the offer
you'll have full access to their Admin Console and account. The partner support line can help you get setup to be a Cloud Essentials Partner if you are not one already or you can look here: http://www.microsoftcloudpartner.com/
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