Ensure that risks, assumptions and constraints are identified and documented and that the risk-mitigation plan has been agreed by all groups involved.
An example of an assumption: is “software assurance” for SQL Server licenses present?
An example of a constraint: available network bandwidth between on-premises and SDDC (Is AWS Direct Connect (DX) available?)
An example of a risk: different CPU generations between on-premises ESXi hosts and hosts in an SDDC