Backup is the method of making copies of your important data so that it can be used to restore the original data after data loss event. It is the last line of defense against data loss.
Backup is the most important and useful method used for restoring the data especially in case of Outlook PST files. But sometimes, you may find that your backup is also damaged and you can't restore data using it. When you try to access the PST files from backup, you may get the following error messages:
"Properties for this information service need to be defined prior to use"
And then
"The file .... is not a personal folders file"
In these situations, you outlook PST files become inaccessible. Most of the computer expert says that you can use Scanpst tool to remove the errors from your PST files but it doesn't work if the pst files are corrupted due to external reason like virus attack, improper system shutdown or oversize.
In these situations, you need to repair your Outlook PST files in order to access and use them. To perform this task, you need to use PST repair software, also known as Outlook PST repair software. These software are able to recover and restore the corrupted Outlook PST files in almost all possible cases of corruption. PST repair software works on the header of the corrupted PST files and restore it in the original format without modifying the original contents of the file. You can use outlook PST repair software without any prior technical knowledge.
This article is free for republishing
Source: http://peterpaul.articlealley.com/pst-repair-after-backup-corruption-515128.html