question

RadimVlek-4473 avatar image
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RadimVlek-4473 asked ChristyZhang-MSFT commented

Problem with archive mail folders (.PST files)

Dear, I am asking for your advice. We use the option of archive mail folders = PST files for users in their mail profiles, where users archive older mail that they do not currently need, etc. Users have these PST files stored in their HOME directory, which is a network drive on FS in the given location. Sometimes it happens to us that users hear that mail is being lost from these files, sometimes a few records, sometimes even mail in the last few months. Some time ago it happened to us again, the user lost about 8 months of mail. The only thing I could think of was to completely disable the use of offline files using GPOs, but that didn't fix the problem.

Another user said today that he had lost a lot of mail from the archive file. Can't you think of someone where there could be a problem, or if you have encountered something similar, I welcome your know-how.

The strange thing is that the PST files that the users have stored in the network storage have strange dates, such as one from 2020. And I see the user that the PST file has emails stored there from yesterday, for example, I'm worried about it somehow. too much to do so that the loss of emails does not become a widespread problem.

So where are the files stored? Probably not in the PST, somewhere in some cache? Advise pls.

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1 Answer

AndyDavid avatar image
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AndyDavid answered ChristyZhang-MSFT commented

well, for one thing, its not supported to use PSTs on a network drive:
https://docs.microsoft.com/en-us/outlook/troubleshoot/data-files/limits-using-pst-files-over-lan-wan

Users should either create PSTs locally on their workstation or not at all
Increase their mailbox quotas if you can.

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Hi @RadimVlek-4473 ,

Welcome to our forum!

What's the version of your Outlook? (File > Office Account > About Outlook). And please make sure you have upgraded your Outlook to the latest version.
And does this issue occur with everyone in your organization or with specific users?

According to you description, I noticed that you have stored the archived file in a network drive. Agree with AndyDavid, to further confirm whether the issue is related to network drive, please try to choose to save the archived file locally and check if there're any differences.

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Outlook version:
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And just that it doesn't happen everywhere. But the worst is the timing, you see the mail today and you lost months of mail tomorrow. Those records should be stored somewhere? But where is it stored, if not directly into that PST?

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Hi @RadimVlek-4473 ,

Thanks for your reply!

I can fully understand your feeling. As I mentioned in my previous post, in order to further confirm whether the issue is affected by the storage location, please try archiving locally to check if there're any differences.

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Hi @RadimVlek-4473 ,

I am writing to see if there is any progress on the issue. If you have any questions or need further help on this, feel free to post back.

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