The aim of this Knowledge Base article is to address the query regarding the 'Retry' option at the Mobility Group level, by clarifying if a migration resumes from its point of failure or initiates a complete restart.
VMware HCX 4.11
When utilizing the 'Retry' option for an OSAM migration, the process will restart from the beginning.
Please refer VMware HCX User Guide : Retry a Failed or Canceled Migration