Outlook 2016 closes unexpected

cpx_Support
cpx_Support used Ask the Experts™
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Sincé few days every time I Open Outlook 2016 It says that the file xxxx.pst is corrupted, and it ask me to repair it. I say yes, It opens a new program "Microsoft Outlook Inbox repair tool" and it proced to first make a backup copy and then to repair it. Then I can open Outlook, but afer some time 30 min, 1 hour... Outlook closes and say again the xxx.pst is corrupted.

I'm subscribed to  Office 365, using Outlook 2016 connected to 4 emails
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Author

Commented:
My Ost file is 3 GB large, is it too much? could be it the problem? How to reduce it?
RaminTechnical Advisor
Commented:
That is a normal size.  
When you use Outlook, the following .ost size guidelines generally apply:  
Up to 5 gigabytes (GB): This file size should provide a good user experience on most hardware.

More Details:
https://support.microsoft.com/en-us/help/2695805/how-to-troubleshoot-performance-issues-in-outlook
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Distinguished Expert 2018
Commented:
Just to be on the safe side, create a new Outlook profile and see how it behaves. If you are still facing the same issue, run Outlook in safe mode (either hold the CTRL key while launching it or type 'Outlook /safe' in the run box), see if the issue remains. In addition, disable any AV and other types of scanning software (malware scans, backup scans, etc).
Jerry FreyB2B Executive

Commented:
It seems like your PST file is severely corrupted. I suggest you, repair your PST file with Inbox Repair Tool until it shows no error. In case if that does not work for you then you can go for a third party tool like Stellar Phoenix Outlook PST Repair software.

You can get software's demo version from here: https://www.stellarinfo.com/outlook-pst-file-recovery.php
E ATech Lead

Commented:
Lots of good suggestion here, please post back if you have any query.

Moreover, check this discussion:  https://answers.microsoft.com/en-us/office/forum/office_2010-outlook/outlook-closes-unexpectedly/a555e5f5-7c82-40e5-9607-a310fc1afe09

Author

Commented:
I'm using the scanpst.exe to try to repair the ost files.
After it, it says "It has been repaired" But if I try to repari again it says that it must be repaired.
Here is the log after repairing:


Microsoft (R) Inbox Repair Tool
© 2016 Microsoft Corporation.  All rights reserved.

Version 16.0.8201.2200


**Beginning NDB recovery

  **Attempting to open database

  **Attempting to validate header

  **Attempting to validate AMap

  **Attempting to validate BBT

  **Attempting to validate NBT

  **Attempting to validate BBT refcounts

    ??BBT entry (8015B90) has different refcount in RBT (5 vs 2)
    ??BBT entry (8015B94) has different refcount in RBT (5 vs 2)
    ??Couldn't find BBT entry in the RBT (8106AA8)
    ??Couldn't find BBT entry in the RBT (810C880)
    ??Couldn't find BBT entry in the RBT (810C884)
    ??Couldn't find BBT entry in the RBT (810C88A)
    ??Couldn't find BBT entry in the RBT (810E554)
    ??Couldn't find BBT entry in the RBT (810E558)
    ??Couldn't find BBT entry in the RBT (810E562)
    ??Couldn't find BBT entry in the RBT (810F560)
    ??Couldn't find BBT entry in the RBT (810F564)
    ??Couldn't find BBT entry in the RBT (810F56E)
    ??Couldn't find BBT entry in the RBT (8113998)
    ??Couldn't find BBT entry in the RBT (811399C)
    ??Couldn't find BBT entry in the RBT (81139A6)
    ??Couldn't find BBT entry in the RBT (8117A0A)
    ??BBT entry (81183F8) has different refcount in RBT (4 vs 2)
    ??BBT entry (8118788) has different refcount in RBT (4 vs 2)
    ??BBT entry (811878C) has different refcount in RBT (4 vs 2)
    ??Couldn't find BBT entry in the RBT (8118790)
    ??Couldn't find BBT entry in the RBT (81187C2)
    ??Couldn't find BBT entry in the RBT (81199B8)
    ??Couldn't find BBT entry in the RBT (81199BE)

  **Attempting to validate header NID high-water marks

**Beginning PST/OST recovery

  **Attempting to recover all top-level objects

    **Store created by build: 15.4454

      !!Folder invalid high-water-mark (nidi=86CAB, nidiHigh=86CCB)

      !!Search folder invalid high-water-mark (nidi=86CAB, nidiHigh=86CBC)

  **Attempting to walk all folders

        Failed to add row to the FLT, irow = 357, RowID = C70E04
        Failed to add row to the FLT, irow = 356, RowID = C6B464
        Failed to add row to the FLT, irow = 355, RowID = C49904
        Failed to add row to the FLT, irow = 354, RowID = C444A4
        Failed to add row to the FLT, irow = 353, RowID = C3C9E4
maybe your Outlook ost file is corrupt. This same thing happened with me also

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