2017-10-20 13:36:46 UTC
Is your outlook not accessing default ost folder emails ,so there may be reason behind it such as corruption ,deletion ,etc .
I would like suggest a solution that is https://medium.com/@romantrump/100-verified-atom-techsoft-outlook-ost-to-pst-software-946a1cf60e21
download outlook ost file recovery software from this article site and install it on your system for ost file recovery .
This software is advance and satisfied solution for accessing ost default folders .Because if ost file corrupted then outlook do not access file .So for accessing corrupted ost file into outlook ,you have need of good and well guideline provider tool .So choose this above solution and recover ost file data and convert ost into outlook pst file and as well as access whole of your ost default folder .