Olmapi32.dll is considered as one of the most important file as they are responsible for providing the messaging interface in MS Outlook whose file size is 2.8 MB. But these significant files can get damaged in case of abnormal situations due to which the data stored in the PST files are inaccessible. So, to again access the PST files, you can use PST Repair software. It is highly efficient in recovering the data of the PST files regardless of any corruption issue. This tool repairs the PST as well as Olmapi32.dll file either by renaming the files or adding some more functionalities in the version and hence making it the updated one. For more info http://www.olmapi32.com