Once you re-open Outlook, your OST file is automatically recreated or rebuilt. If your hard drive goes through any physical damage, it will damage the data across it too. A bad sector or corrupted hard drive can cause OST inaccessibility.

Outlook - Corrupt OST

An Outlook data files are designed to safely handle max space 50GB in Outlook 2010 to 2019 and Office 365 by default. You can try syncing outlook file 6 to 12 months or through archiving email using retention policy, could be a better way to protect the .ost size from corrupt. As it is converted, you can easily view the contents of the data file. This will protect your fix MFA prompts not working email data and can be exported anytime.

How to recover OST files

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

• Outlook 2016 connecting to Office 365 E3, mailbox size ~55GB and Outlook reghack effected to allow for ~80GB OST.
• Further, the saved PST file could be accessed at any time by importing it in the Outlook profile.
• Find solutions to common problems or get help from a support agent.
• You can try syncing outlook file 6 to 12 months or through archiving email using retention policy, could be a better way to protect the .ost size from corrupt.
• It is surely possible to rebuild the OST files at any instant.
• Only way to restore Outlook 2016 (Windows) functionality was to create a new profile; this worked, and a new OST file was created.
• I don’t have an answer to this other than to voice my suspicion that it is likely due to new Microsoft updates (windows and office).

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?

While this is an effective model, the discussion would revolve around all possibilities. We will help our readers decide the best way to rebuild OST for functioning through Outlook. For the past 2 weeks, the OST of my Desktop Outlook has been corrupting continuously. I have 2 computers and both have been facing the same issue.

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 Repair Outlook Profile Online 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 Repair Outlook Profile Online repair services. Its specialty is definite for PST and OST files, likewise.

On the next screen, access the "Find File" option if you are unaware of the location. If you know the location, click on the "Add File" tab and browse it. Malware or virus attacks can cause great havoc across the computer. Every important data and detail might be damaged due to it. Virus attacks can directly attack the OST file, which would disrupt its data.