Outlook 2007 PST size

How do I increase the PST size of Outlook 2007 ??? . I tried by editing the registry and reached at the location HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook
but I do not find PST after this...PLEASE HELP!!!!!!       
Sam-PhukonAsked:
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shauncroucherCommented:
Increase the size? 2007 created PST is rated at 20GB which is a UNICODE recommended limit.

I wouldn't try using a PST bigger than that.

Shaun
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thompsonwirelessCommented:
What exactly are you trying to accomplish by increasing the size?
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nsx106052Commented:
By increasing the size you will probably have numerous issues with Outlook not too mention the PST file may become corrupt.  If you need to archive I would recommend trying to keep the PST files to around 4 GB. Just create several of them or break it down by year.
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Sam-PhukonAuthor Commented:
The PST size is as of now 2 GB
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thompsonwirelessCommented:
You do not need to resize the PST file.  It will grow as needed.
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shauncroucherCommented:
IF the PST has been attached or created from a Outlook 2000 or older version, it may be ANSI format and therefore 2GB limit. If that is the case, I would create a new Outlook 2003-2007 PST using Outlook 2007 and then import mail from the PST in question.

Shaun
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Sam-PhukonAuthor Commented:
Its not getting increased and I get a warning from Microsoft that it cannot be exceeded.  Is there any thing that I can do to change this setting.
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shauncroucherCommented:
I would create a new Outlook 2003-2007 PST using Outlook 2007 and then import mail from the PST in question.

Shaun
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ashishkpandeyCommented:
Before Outlook 2003 all the PST were ANSI PST files which supported the PST size only till 2 GB. From Outlook 2003 onwards and Outlook 2007 and outlook 2010 the PST size can grow large as much as 100 GB. But this will only give rise to performance issues.

To accomodate the large PST files need to follow the recomendations as mentioned in Microsoft KB article http://support.microsoft.com/kb/832925

If you cannot follow the article then here are the steps that can be done :

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook\PST

If the Key is not present then you need to create the key manually

Then create  dword values as following:
dword: MaxLargeFileSize
Value: 20480 (decimal)
dword: WarnLargeFileSize
Value: 19456 (decimal)

Also make the same chnages at the following registry as well:

HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\PST

If the Key is not present then you need to create the key manually

Then create  dword values as following:
dword: MaxLargeFileSize
Value: 20480 (decimal)
dword: WarnLargeFileSize
Value: 19456 (decimal)

Hope this helps
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shauncroucherCommented:
If you ever knowingly have a PST that is anywhere near 100GB, woe betide you.

It just isn't sensible to have a PST that is massive as PST files become corrupt from time to time, thats just the nature of PST files.

I recommend not going beyond 20GB at any time, find a more responsible solution.

Shaun
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ashishkpandeyCommented:
This was only what is possible. If i have to use a PSt i will not make it more than 5 GB as the PST tends to corrupt.
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