Upload the Exported ADIF file from LoTW from the Download Report Area, to mark QSOs as confirmed on LOTW.
Important Log files must have the file type .adi
From date:
Cloudlog will use the LoTW username and password stored in your user profile to download a report from LoTW for you. The report Cloudlog downloads will have all confirmations since chosen date, or since your last LoTW confirmation (fetched from your log), up until now.