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Backup of the OST-File

Jul 12, 2014 at 8:10 AM
Outlook 2013 Backup Add-In is working just great for my PST-Files (two accounts).

But most of my data is in the OST-File in the AppData-Folder. I know all my IMAP-Stuff is on the server as well, but nevertheless I save the OST-File manually.

Would be great to include it into your product.
Jul 13, 2014 at 12:19 PM
Edited Jul 13, 2014 at 12:23 PM

I checked the website
OST-Files are used for accounts with exchange server.
PST-Files are used for IMAP and POP3 accounts.

If you are in an enterprise environment with an exchange server, the server administrator should take care of backups.

So you shouldn't need to take care of backup OST files.
Jul 14, 2014 at 8:52 AM
Edited Jul 14, 2014 at 8:52 AM
Hi Thomas,

the above mentioned website applies to OUTLOOK 2010 (only). In OUTLOOK 2013 the IMAP data resides in .OST as well. Unfortunately the Calendar items and Contact data which are not part of IMAP are stored in the .OST-File. Therefor its not so paranoid to save .OST ...
I use googlemail, sync calendar and contacts with two different tools, backup my .PST-Files (from two POP3-mailboxes) with your tool now and handle the backup of .OST manually. Again: would be great to have it automatically!
I've 2 websites for you - unfortunately in german - I think the google translator is smart enough:

Thanks a lot for your time - and especially for your OUTLOOK 2013 BACKUP ADD-IN!

Kindly regards from Bavaria
Jul 19, 2014 at 8:58 AM
I will check if i can get the ost-locations too.
Currently my computer with development environment broke down, so it will take a while till i can check it.

Deutsch ist kein Problem ;)

Kind regards,
Aug 2, 2014 at 1:30 PM

I had the opportunity to check this topic. The location of the OST-Files is somehow not accessible via code.
You can use OutlookSpy to take a look at the storages. Only locations of PST-Files are published via outlook api.

The documentation says something else:
but you can convince yourself via OutlookSpy that the location is not visible :/

Kind regards,
Aug 3, 2014 at 1:22 PM
Checkout the beta version of 1.3 where i added a post-backup command option:
With this option you can perhaps add a batch file which copies all ost-files.
(that version also temporarily includes the option to backup ost-files but this ugly method will not be maintained in further versions)

Kind regards,
Aug 4, 2014 at 1:09 PM
Hello Thomas,
sure I trust your statements, but installed OutlookSpy anyway. And now I know that I'm not a developer (didn't find the right cave) ... despite I developed software many year ago in the IBM mainframe environment - a totally different world!
Then I installed 1.3beta and figured out: Image - you should know the location, it's in your settings (and config-file as well). But nevertheless I accept that you will not support this "ugly method" and will try the batch file option.
Again thanks a lot!
Best regards
Aug 4, 2014 at 1:27 PM
It's me again: the batch file solution works!
The image function in my preceding message not - Image - my fault!
Thanks for implementing the post backup cmd.
Aug 4, 2014 at 7:41 PM
Both should work... the post-backup skript and checking the OST-files. The path of the OST-files seems to be correct, is it?
Aug 4, 2014 at 10:07 PM
Yes Thomas, all pathes are correct. But only the .pst-files are copied.
I'm very glad with the post-backup-cmd-solution - now all relevant files are backuped automatically.
Aug 5, 2014 at 8:37 PM
Oh.. now you got me.
It only worked when manually checking all files. "Backup all psd-files" doesn't backup OST-files despite they seemed checked.
So either manually checking all files or the post-backup skript should work with OST-files. This is fixed in the sources now.

In future versions there will be a hidden parameter in the config-file to activate this OST-feature.
It is already available in the source code.