I used the AZCopy to copy some PSTS up to the Azure blob to copy them to 365
All users apart from one imported OK
One user came back with “Completed With Errors View details”
Status Failed – Import in progress
After checking with 365 , this was due to the user having a soft deleted mailbox
Login to MSOLINE via powershell and run
Remove-MsolUser –UserPrincipalName <account id> -RemoveFromRecycleBin
Trackback from your site.