If you want the best ways to Resolve Error- “The data file is associated with a mail account OST” so you can try the eSoftTools OST to PST Converter tool. This tool exports single as well as multiple files instantly in PST format without an Exchange server. It’s 100% tested from anti-virus and online scanners. It can Support ANSI and Unicode format. This tool is based on a GUI Operating System.
Read More:- The data file is associated with a mail account OST
if you search any ost to pst converter software and not find any ost to pst converter software try stella ost to pst converter software to convert all ost mailbox items in to pst file this software is convert all 32bit and 64bit ost file this software is convert all ost mailbox items using some simple steps. This software is convert all corrupted and unmounted ost mailbox items in to pst file. for more info visit this link https://www.stelladatarecovery.com/ost-to-pst-converter.html