"Couldn't transfer storage on any of the endpoints. 0x9044"
And detailed error in WAC like:
"Check if the source device is online - we couldn't access it."
And an event log entry like:
"Error ID: 36931
Couldn't transfer storage.
Guidance: Check the detailed error and make sure the transfer requirements are met. The transfer job couldn't transfer any source and destination computers. This could be because the orchestrator computer couldn't reach any source or destination computers, possibly due to a firewall rule, or missing permissions."