Azure plan transfer between partners with Marketplace subscription

Hi folks

We are facing a partner-to-partner CSP transition - we are the new partner, and we found out that the customer has a Sendgrid marketplace subscription from the previous partner. 

Do you know if this is a straightforward transfer, or does it fall under the marketplace limitations listed here: https://learn.microsoft.com/en-us/partner-center/customers/transfer-azure-subscriptions-under-azure-plan#considerations

Thank you