I recently ran into this and wanted to share, as I'm sure others may run into this as well.
As many of you may know, Windows RT 8.1 includes a version of Outlook 2013...so that you're not limited to just using the Windows Mail app...which is great! However, what many may run into is that the default location for storing your OST is C:\Users\<login>\AppData\Local\Microsoft\Outlook. Which, if you have the 32GB Surface (or equivalent) you probably don't want a big OST file eating up your space. In my case, I installed a 32GB SDHC in my Surface RT and wanted the OST to be there.
The issue is that you can only set where the OST file is created during Profile creation...not once you've setup the profile. If you try once the profile is setup, the option to Browse and select where the OST file goes is grayed out.
This KB article http://support.microsoft.com/kb/2752583 explains how to set where to put the OST during Profile creation and *is* also applicable to Outlook 2013 on Windows RT.
In case of OST data deletion, corruption, or destruction, it is required to perform OST data recovery instantly. Acquiring a powerful Exchange OST to PST converter and recovery tool will help you out to remove damages from OST files those are inaccessible or gone out of reach of user due to some unknown reason. Our Exchange OST Recovery is a brilliant tool that plays the role of amazing OST repair tool along with fulfillment the need of converting recovered OST files into PST file format without losing single property of data within.
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Archiving these files can change the file format to PST or you can also convert these files to new PST file. I would suggest you to backup your mail files before converting so that the original files remain safe.
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I found better option to recover deleted emails from OST file.
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