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 repair services.

I can't repair corrupted Outlook .ost file

You need the right tool that does not corrupt or damage the data in the process. Convert your OST to PST for optimal results if rebuilding the OST file does not do the trick. Further, the saved PST file could be accessed at any time by importing it in the Outlook profile.

Part 1: Can OST Files Be Rebuild?

I have 2 computers and both have been facing the same issue. You can check the location of your Outlook Data Files in how to fix Outlook not opening today Outlook.

Method 3: Convert OST to PST

You might be working on something Outlook Stuck on Synchronizing Folders important across it when it happens. As you said Outlook E3 licenses should support at least 100GB of data & there’s no excuse why it can’t support OSTs above 50GB when they offer twice that space. Refer to this blog Solutions To Fix Error – "Errors Have Been Detected In The File Xxx.Ost" Solutions To Fix Error – "Errors Have Been Detected In The File Xxx.Ost" for the solution to this OST error. This article offers to rebuild the OST file without putting you in any difficulty.

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

Confirmed user clear Outlook credentials manager 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 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.

• The functionality is diverse, and it can be approached in multiple directions.
• Open the OST file as per the location provided in the table.
• If your computer faces unnecessary power outages during a process, it can be damaging.
• In certain cases, you must go for other methods to recover the data across OST files.
• Find solutions to common problems or get help from a support agent.
• Convert your OST to PST for optimal results if rebuilding the OST file does not do the trick.
• This is all most people will need, searching for older items will be slower but for daily use items it will still be quick.
• This article offers to rebuild the OST file without putting you in any difficulty.

As you change the extension, relaunch Outlook to rebuild your OST 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 question mentioned above is thus definite in such a case.



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. The functionality is diverse, and it can be approached in multiple directions. When the case comes to rebuilding the OST file, there are several things to look out for.