Exchange 2013 Recovery, use OST files

Hello

Please your help.

We have the following scenario:

A farm of Exchange 2013 Servers, due to a power supply failure, all of the information is corrupted including the backups.

So far a installation in recovery mode has been done, but as long as the backups are not available; when the users configure their Outlook client, the OST file is overwrited and all the mailbox data is gone. All of the users use Outlook as email client.

What we want is to synchronize the mailbox data from the OST files, the normal process would be to convert the OST to PST and the import it into the user's mailbox.

Is there a way where the Outlook clients automatically synchronize the data from the OST to the Exchange mailbox Database without the requirement of the previous OST to PST convertion and import process??

Any help is welcome!

Regards. Cristian V.