PST file not opening in Outlook, need recovery help
Solved Email & Outlook
AJ
Andrew Jackson
June 11, 2018
2 replies
12,300 views
Reviewed by moderators

My archive PST refuses to open. Outlook says the file is not a valid personal folders file. It holds 8 years of client history. ScanPST found errors and repaired them but the file still will not mount. Any recovery route left?

Accepted Answer
Verified by Kerry Morris, Forum Moderator ยท Reviewed June 2018

ScanPST only fixes header level damage. When the internal B-tree is broken it reports success and changes nothing.

1
Work on a copy of the PST, never the original.
2
Run SysTools Outlook Recovery. It scans at item level and rebuilds mail, contacts, calendars and attachments into a fresh PST.
3
Use Quick scan first. Switch to Advanced only if items are missing, since it takes far longer on big files.

Quick scan alone got 96 percent back. Advanced picked up the stragglers overnight. 8 years of history intact. Solved.