If you want to Resolve Error- “The data file is associated with a mail account OST”. You can try the third solution eSoftTools OST Recovery tool. It can able to convert OST corrupted data into multiple formats -PST, EML, Zimbra, Yahoo, Gmail, MBOX, EMLX, Office 365, MSG with email properties like To, cc, bcc, subject, contact, attachment, and other items. This tool easily works with all window versions like XP, 7, 8, 10, etc. Users can try a free demo version of this tool from the official website of eSoftTools.
Read More:- Convert OST corrupted data
Workarounds to Fix 'This data file is associated with a mail account OST File' Issue
Workaround 1: Remove OST File Email Account.
Workaround 2: Remove Corrupted Outlook Profile and Create a New Profile.
Workaround 3: Deleting OST Files via Registry Editor.
Regards, J wick