PST Archive keeps getting corrupted

I have one user that keeps getting corruption problems with a mail archive.
Every 2 or 3 years the current archive is renamed, and a new one is started to keep the size down.

This particualr archive is 5.1Gb. Rather big, but we have others that are larger and dont keep getting corrupted.

We run Scnpst.exe and it fixes it. The user is able to acess it again, but only after a few days it is corrupted again. This keeps happening.

What might be causing the corruption, or what can I do to prevent it? I need to ensure the user can access these important files.

The user is currently running Win7pro, and Office 2007pro. As the archive is old, it contains data when the user was on XP and Office 2003

Cam
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JDCamAsked:
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vanbarsounCommented:
PST files are notorious for corruption, and they are not supported beyond 2GB. I would advise to COMPACT it, if you haven't already, to possibly reduce the size somewhat, and then to really reduce the size by archiving items out of it by date. You'll probably have to archive several times in order to split the file so it's less than 2GB. Also, don't forget to re-compact the file AFTER you archive items out of it.

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stressless-ITCommented:
you need to get that pst below 2GB they get really flaky over it. i had this 2 months ago with a user only 1 just like you. archive it if you can.
JDCamAuthor Commented:
I will attempt this as soon as I can. I need to rereun scnpst against it so I can open it again before I can attempt to compress or archive the contents.  A long and tedious process

stressless-ITCommented:
you can set mailbox size limits within exchange. and also audo arciving.
davorinCommented:
@vanbarsoun:
"PST files are notorious for corruption, and they are not supported beyond 2GB."

You are partially correct. If we are talking about ANSI pst files, they can grow beyond 2GB, but they frequently become corrupted - as in this case.
This is not the problem with UNICODE pst files. UNICODE format is the new pst-file format used in Outlook 2003, 2007 and 2010. Default maximum size in Outlook 2003 and 2007 is set to 20GB, while in Outlook 2010 is set to 50 GB. This maximum size can be changed up to 4TB. Anyway, I don't see myself repairing 1TB big pst file. It can take a weeks, so it is good to keep them small - under 2GB.
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