There are a few methods that let you perform the Boolean search, Excel-like filtering or instant search in multiple .pst and .ost files without Outlook at once. Supports any .pst and .ost files: corrupted, orpah, archive, password protected and encrypted files. Looking to sensitive email or contact someone, but not certain which file or account you put it in, you'll be able to find it easily with a single search.
Open OST PST Viewer (pstwalker.exe), make sure that Outlook data files that you want to search are open (if they are, you'll see them all in the All Folders Pane). Select All Mail Items as the location for your search, choose Advanced search option and enter the keywords you want to search for in your .pst and .ost files. You can use the additional options to customize how your search term is searched, such as case-sensitive, email header fields, and so on.
Finally, click on the Search button or press Enter to begin searching. You can review the results as far as they appear on your screen. You can sort, filter and refine your search results to find exactly what you want.
Sort your search results and filter using the Quick grid view search or an Excel-like filtering interface.
1. Quick grid view search. Search text in the visible grid columns and draws a highlight box around any substring that matches its given text.
2. An Excel-like filtering interface. Right click on a column's header, a "Filtering" menu item will be presented. This will let the user select one or more distinct values from that column. When click "Apply", only those rows that have one of the chosen values for that column will be displayed.