If you are looking for a solution to recover the OST file with attachments like calendars, contacts, mailboxes, attachments, etc. Then you should need to use the Exchange OST recovery. It recovers corrupted OST files and offers you three modes of recovery standard, advanced, and deep. It saves the recovered OST file into PST, EML, MBOX, and Archive. This advanced tool scan and repairs the OST file. It is compatible with all versions of MS outlook and Windows OS.

To restore data from the ost-file;

Close Outlook.
Rename the current ost file of the account to .old.
Restore the ost file to the location of the current ost file and rename it if needed.
Disconnect yourself from the network to make sure that no changes are being synched when the account reconnects. This could for instance empty the ost file if the data was no longer on the server.
Start Outlook.
Export any data that you wish to keep to a pst-file.
Close Outlook.
Delete or rename your recovered ost file. If your original cache was still working, you can rename it back from .old or otherwise make sure there is no longer an ost file for your account.
Reconnect yourself to the network.
Start Outlook.
Once Outlook is done synching, you can import the data from the pst file.

Regards,
Peter