My PST file seems to have disappeared from Outlook 2016, and I can’t find it in the usual folder or open my old emails and contacts. This happened after restarting Outlook, and now I need help locating the missing PST file or figuring out how to restore it so I can access important data again.
Losing track of a PST file hits fast. I’ve seen Outlook open with a fresh empty mailbox look, and for a second it feels like years of mail got wiped. Sometimes the file is gone for real. Sometimes Windows only marked the space as reusable and the data is still sitting there.
First thing I’d do, stop using the PC for normal stuff. No random downloads, no big installs, no copying movies around. When Windows deletes a file, it often removes the pointer first and leaves the contents until something else lands on top of it. Every extra write lowers your odds.
Start with the obvious spots
Open Recycle Bin and search for the PST name if you remember it. If you deleted it with the normal Delete key, you might get lucky and restore it in one click. If you used Shift+Delete, skip the hope part and move on.
I’d also check any sync service tied to the folder. OneDrive, Dropbox, Google Drive, whatever you had running. Open the web version, not only the local folder, and look in deleted items and version history. I’ve had files disappear locally while the cloud copy was still sitting there untouched.
Try Windows snapshots
Windows sometimes keeps older folder versions, and this part gets overlooked a lot.
Go to the folder where the PST used to live. Common path:
C:\Users\YourName\Documents\Outlook Files
Right-click the folder, hit “Restore previous versions.” If you see a version dated before the file vanished, open it and copy the PST somewhere safe. I’d put it on another drive if you have one.
If those fail, use recovery software
At this point, Windows usually treats the file as gone. The data still might be recoverable if nothing overwrote it.
I’d use Disk Drill for this sort of thing. It scans the drive directly and looks for deleted entries, including PST files missing from File Explorer.
A few things matter here:
Install it somewhere other than the drive you’re scanning, if you have the option.
Scan the system drive, usually C:.
Search for *.pst or filter by PST.
Check file sizes before restoring anything.
Don’t grab the first match and assume you won. Outlook often makes a new tiny PST after the old one disappears. Your real mailbox file might be 500 MB, 2 GB, or more.
Restore the file to a different location. External drive is best. Desktop works if you have no other choice, though same drive isn’t ideal.
Watch for Outlook making a fake fresh start
This part fools people. Outlook fails to find the old file, then builds a new blank one. The app opens, profile looks alive, but your folders are missing and it feels broken in a weird quiet way.
After you recover the old PST, don’t overwrite anything yet. Open it manually inside Outlook:
File > Open & Export > Open Outlook Data File
Pick the recovered file from wherever you saved it. If it’s the right one, your old folder tree should show up in the sidebar. After you confirm the mail, contacts, or archives are there, go into Account Settings and set it as the default data file if needed.
If the mailbox was IMAP, the situation changes
If your account was IMAP, the mail server still holds the synced mailbox in many cases. Re-adding the account often makes Outlook build a new OST and pull the mail back down.
Still, I wouldn’t assume everything returns. Local archives, custom folders stored only in the PST, old rules, and mail dragged out of the server mailbox into personal folders might stay missing. I’ve seen people get their inbox back and still lose years of archived stuff because it lived only in the deleted PST.
After recovery, don’t leave it exposed again
Once you get the file back, copy it somewhere with real backup coverage. External drive, backup folder, NAS, whatever you trust. Even a manual copy on a schedule beats pretending Outlook has your back here. It doesn’t, not always.
One good sign is file size. If the recovered PST is large, that usually means you pulled back the real data file and not the empty replacement. Open it in Outlook first. Check the folders. Check the dates. Then clean up the junk later.
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Outlook 2016 often loses the path, not the file. I’d check Outlook’s own profile settings before treating it like deletion.
Go here:
Control Panel > Mail > Data Files
If the old PST is listed, note the full path. Outlook sometimes points to a dead location after an update or profile hiccup. If it shows “cannot be found,” you have your answer. The file path broke.
Next, search Windows properly. Not File Explorer with a quick guess. Use:
*.pst
Then sort by Date modified and Size. A real PST is usually hundreds of MB or more. A new empty one is tiny. I agree with @mikeappsreviewer on watching for the fake fresh mailbox thing, but I’d start with profile mapping first since it takes 2 minutes.
Also check these less obvious spots:
C:\Users%username%\AppData\Local\Microsoft\Outlook
C:\Users%username%\OneDrive\Documents\Outlook Files
Any old drive letter if you moved archives before
If search finds nothing, build a new Outlook profile in Mail > Show Profiles. Sometimes the old profile is the problem, not the data file. Add the account, then attach any found PST manually.
If the file is gone from disk, Disk Drill is a solid next move for PST file recovery. Search by extension and restore to another drive. Do not save recovered files back onto C:, that part trips ppl up.
For extra reading, this thread covers Outlook PST file recovery steps in plain english:
Outlook PST recovery help after accidental deletion
One more thing. Run scanpst.exe on any PST you do find before assuming it’s dead. Outlook 2016 installs it here a lot of the time:
C:\Program Files (x86)\Microsoft Office\root\Office16\SCANPST.EXE
If you post the file size and path you found, ppl here can tell fast if it’s the old one or the blank replcement.
Before assuming the PST vanished, check whether Outlook switched you to a different delivery location. That happens more than ppl think after a restart.
In Outlook 2016:
File > Account Settings > Account Settings > Data Files
Look at which file is marked Default. If Outlook created a new blank PST, set that aside and inspect the others. Also go to:
File > Open & Export > Import/Export > Export to a file > Outlook Data File (.pst)
Not to export anything, just to see what folder tree Outlook thinks exists. Sometimes the old data is still mounted indirectly, just not obvious in the left pane.
One thing I’d add to @mikeappsreviewer and @andarilhonoturno: check Windows Search indexing. If your PST is on an external drive, secondary SSD, or old mapped folder, Windows search may miss it unless that location is indexed. In that case use Command Prompt instead:
dir C:*.pst /s /a
or run it against another drive letter. Crude, but it finds stuff Explorer skips.
If you do locate a PST but Outlook refuses it, don’t instantly trust scanpst to fully save the day. It can repair structure, yes, but it also sometimes trims damaged items. Make a copy first. Then test the copy.
If the file is truly gone from disk, Disk Drill is a reasonable move for Outlook PST recovery since it can scan for deleted PST files and restore them somewhere else. That’s probly the point where software matters more than Outlook settings.
Also worth checking Event Viewer under Windows Logs > Application around the time Outlook restarted. If Outlook crashed, a sync tool locked the file, or the disk coughed up an error, you may see the real cause there.
For anyone trying to pick the best PST recovery software for lost Outlook files, the main thing is whether the file was deleted, moved, or just detached from the profile. Those are 3 diff problems, and ppl mix them up a lot.
