Although the repair process might recreate some of the folders, they may be empty. The Lost and Found folder contains any folders and items recovered by the repair tool that Outlook can't place in their original structure. You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file. The Inbox Repair tool checks the Outlook data files on your computer to see if they're in good shape.

Outlook - Corrupt OST

Confirmed user can log on to OWA (Office 365 webmail) without issue. Upon starting Outlook, error message displayed is "Errors have been detected in the file ," then prompt appears FixTechGuide fix for stuck folders to locate (not fix) the OST file. Outlook 2016 connecting to Office 365 E3, mailbox size ~55GB and Outlook reghack effected to allow for ~80GB OST. If your computer faces unnecessary power outages during a process, it can be damaging. When Outlook is running and is halted in such a way, it can damage the OST file.

How to recover OST files

You can check the location of your Outlook Data Files in Outlook.

• This will protect your email data and can be exported anytime.
• You surely won't be disappointed with the results of rebuilding OST.
• If you only keep 6 or 12 months offline that will reduce the OST size significantly.
• These issues occur when Outlook showing the error "Something is wrong with one of your data files and Outlook needs to close.

How to Fix Corrupted OST Files

This can be done with the help of PST files, another Outlook data file form. While they act as the basic backup data file for the user, the OST file can be easily converted to this form. Also, I forgot to mention that normally when the OST is corrupted you normally delete the file and recreate it. I’ve used the repair tool when this started and it did not really repair the file. I used the following combination of techniques to get the user working. In the Folder Pane, you might see a folder named Recovered Personal Folders that contains your default Outlook folders or a Lost and Found folder.

Part 3: How to Rebuild OST Files?

If anyone can get an answer from microsoft on this issue I’d appreciate it. Any MS techs can contact me if they need further information or analysis. I’ve created a ticket today with Rackspace to see if their other customers are having this issue but I’m not hopeful on hearing back from them. Only way to restore Outlook 2016 (Windows) functionality was to create a new profile; this worked, and a new OST file was created.

Repair an Outlook data file (.pst) file

The first solid question that comes to mind is whether OST files are rebuildable. We are aware that OST files are directly connected to the Outlook email. The Exchange connectivity diagnostic question mentioned above is thus definite in such a case.

What are the major Reasons of OST Corruption and how to Fix it

Even with the reg hack in place, I’ve found that ost files over 50gb tend to corrupt and become unusable with regularity. OST file corruption is a common problem faced by Outlook users like you. While you seek to counter this problem, you look for effective techniques. Although there are many methods to try, a few are productive. One such method is to rebuild the OST file across Outlook. The functionality is diverse, and it can be approached in multiple directions.

I can't repair corrupted Outlook .ost file

With an OST file in your hand, you can even retrieve it if it gets corrupted. While converting it was easy, repairing it was also quite basic to process. To execute this, you need to have a good tool with yourselves. Wondershare Repairit for Email fixes all OST file issues with ease. While it is your go-to solution, it provides exceptional Troubleshoot Office 365 Sync and Login Issues repair services. Its specialty is definite for PST and OST files, likewise.

You can create a new Outlook Data File and drag the items in the Lost and Found folder into the new data file. After you've moved all the items, you can remove the Recovered Personal Folders (.pst) file, including the Lost and Found folder. To create a new Outlook Data File, go to Create an Outlook Data File. If you're using an Exchange email account, you can delete the offline Outlook Data File (.ost) and Outlook will recreate the offline Outlook Data File (.ost) the next time you open Outlook.