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AralelemathMaheshCognizant-1711 avatar image
AralelemathMaheshCognizant-1711 asked ·

Protecting OST and PST in Windows10 BYOD

Hi,

I was going through limitations recorded in below article and wonder how we can protect OST/PST files in Windows 10 personal devices/laptop.

https://docs.microsoft.com/en-us/windows/security/information-protection/windows-information-protection/limitations-with-wip

If we are using personal laptop to access O365/Exchange 2016 mailbox, how can we protect the OST file downloaded to device?

Appreciate ant thoughts around it.

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2 comments
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Hi @AralelemathMaheshCognizant-1711
According to your description, this question seems to be related to intune, so we would move the irrelevant tags.

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This question has nothing to do with Intune, it's about protecting the PST and OST files locally on a system. That's explicitly an Outlook related question and removing the tag here makes zero sense. Adding a Windows security tag here makes sense as well as this is also potentially WIP related.

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1 Answer

MarileeTurscak avatar image
MarileeTurscak answered ·

Hi @AralelemathMaheshCognizant-1711,

To protect OST files, there are a few standard recommendations:

  • Use Multi-Factor Authentication for your account. That way if there are any suspicious attempts to access the files the users will need to provide another method for authentication.

  • For Outlook data kept in the computer's disk, a good security measure would be to encrypt the disk.


If you just want to encrypt the files or folders, you can follow these steps:

  1. Right-click (or tap and hold) a file or folder and select Properties.

  2. Select the Advanced... button and select the Encrypt contents to secure data check box.

  3. Select OK to close the Advanced Attributes window, select Apply, and then select OK.



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@MarileeTurscak

I am looking for encrypting/protecting OST/PST files in Windows 10 BYOD, i hope we cant control the BYOD device disk encryption here to protect files. Is there any other option ?

Regards
Mahesh

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