Answered by:
Remove Password from .pst

Question
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How can we removed password from .pst
User had saved password in Credentials Manager however during troubleshooting an issue team removed all saved passwords.
Now user is unable to access emails in .pst..
- Moved by Terry Xu - MSFT Wednesday, July 11, 2018 1:57 AM
Tuesday, July 10, 2018 4:35 PM
Answers
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See list of third party tools at https://www.slipstick.com/problems/pst-repair/remove-a-password-from-a-pst-file/#forgot
- Marked as answer by Andy DavidMVP Wednesday, June 19, 2019 6:34 PM
Tuesday, July 10, 2018 6:19 PM
All replies
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See list of third party tools at https://www.slipstick.com/problems/pst-repair/remove-a-password-from-a-pst-file/#forgot
- Marked as answer by Andy DavidMVP Wednesday, June 19, 2019 6:34 PM
Tuesday, July 10, 2018 6:19 PM -
Hello ViShaa_R,
This forum(Outlook for Developers) is for development issues related to Outlook Object Model and your problem is more related to Outlook product feature, so I would move this thread into Outlook IT Pro Discussions.
Thanks for your understanding.
Best Regards,
Terry
MSDN Community Support
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Hi ViShaal,
As is mentioned in the "Caution" section in this official article, I am afraid there is no way to retrieve the password if you set a password on your Outlook Data File (.pst) and forget the password :(
Regards,
Yuki Sun
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- Proposed as answer by Yuki SunMicrosoft contingent staff Monday, July 16, 2018 9:41 AM
Wednesday, July 11, 2018 9:07 AM -
That is a bit pessimistic. Section 4.2 of "[MS-PST]: Outlook Personal Folders (.pst) File Format" says:
4.2 Strength of PST Password
The PST Password, which is stored as a property value in the message store, is a superficial
mechanism that requires the client implementation to enforce the stored password. Because the
password itself is not used as a key to the encoding and decoding cipher algorithms, it does not
provide any security benefit to preventing the PST data to be read by unauthorized parties.
Moreover, the password is stored as a CRC-32 hash of the original password string, which is prone to
collisions and is relatively weak against a brute-force approach.- One does not need to know the password (or even care that a password has been set) if the "client implementation" (i.e. any PST reader) does not enforce the password.
- A password that can be entered from a keyboard can be relatively easily brute-forced. One may never know whether the brute-forced password matches the "original" password, but since the password is not needed anyway, brute-forcing one is just a "for fun" exercise.
Thursday, July 12, 2018 8:41 PM -
I lost password of my outlook data file, after I install new outlook, it request the old password. Please how can I fix this?
Wednesday, June 19, 2019 4:24 PM