The easiest solution for the Exportation of OST files into MSG in Bulk is SysInspire OST Converter software. This software can easily convert multiple OST files into OST and also in lots of other formats. Also, This software can do data recovery of the deleted OST files.  It has an auto-scan feature that users can use to scan and detect any issue in their laptop then it will automatically repair all errors.  They also provide 24*7 customer support at any time anywhere.

Read more - Export Emails from OST to MSG files in Bulk