How to configure the size limit for both (.pst) and (.ost) files in Outlook 2007 and in Outlook 2003
How to configure the size limit for both (.pst) and (.ost) files in Outlook 2007 and in Outlook 2003 Microsoft
Office Outlook 2007 and Microsoft Office Outlook 2003 supports both American National Standards Institute (ANSI) and UNICODE personal folders (.pst) and offline folder (.ost) files. This article describes how to use the following four registry entries to limit the size of both the .pst and the .ost files:
- The MaxFileSize registry entry
- The WarnFileSize registry entry
- The MaxLargeFileSize registry entry
- The WarnLargeFileSize registry entry
Follow these steps to configure the size limit for both the .pst and the .ost files.
Note The settings that are discussed in this article apply to both .ost and .pst files. If you modify these registries, this can affect .ost files that are used with Cached Exchange Mode, with AutoArchive, and with .pst. files.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
- Click Start, and then click Run.
- In the Open box, type regedit, and then click OK.
- In the left pane, expand My Computer, and then expand HKEY_CURRENT_USER.
- Expand Software, and then expand Policies.
- Expand Microsoft, and then expand Office.
- Expand 11.0 for Outlook 2003 and 12.0 for Outlook 2007, and then expand Outlook.
- Click PST, and then right-click MaxFileSize in the right pane.
- Click Modify, and then type the value in the Value data box.
- Click OK.
- Right-click WarnFileSize, and repeat steps 8 through 9.
- Right-click MaxLargeFileSize, and repeat steps 8 through 9.
- Right-click WarnLargeFileSize, and repeat steps 8 through 9.
Note You may have to create the registry values if they do not exist. If the registry values do not exist, follow these steps to create them.
1. Click Start, click Run, type Regedit, and then click OK.
2. In the left pane, expand following registry key:
- For Outlook 2007
- HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook
- For Outlook 2003
- HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\11.0\Outlook
3. On the Edit menu, point to New, and then click Key.
4. Type PST, and then press ENTER.
5. On the Edit menu, point to New, and then click DWORD value.
6. Type MaxFileSize, and then press ENTER two times.
7. In the Edit DWORD Value window, type the value in the Value data box, and then click OK.
8. Repeat steps 3 through 7 to create another DWORD WarnFileSize.
9. Repeat steps 3 through 7 to create another DWORD MaxLargeFileSize.
10. Repeat steps 3 through 7 to create another DWORD WarnLargeFileSize, and then close the registry.
Note For mass deployment of these registry keys on end-user machines, the ORK tool can be used.
For further information click on this URL:
This is exactly what I was looking for. Thank you for sharing this great article. I am always looking for informative information like this. You are bookmarked! Have a good day.
The above post is very informative and useful. This is exactly what I am looking to configure my .ost file size in MS Outlook 2007
The above mentioned post is very helpful to configure the ost or pst file size limit in Outlook 2003 or 2007. but it is still a little bit tricky and needs some technical experties
I’ve tried to extend my Outlook 2007 file size limit, but in my key registry there is no Office under Policies … WHY ??
where else could i find this ?
I realy need to change my PST file size limit, got to 19.9GB.
thank you
b.regards
Shiv
Hi Shivy,
it’s very strange.
These tricks works with outlook 2003, 2007 and 2010!
Have you tried to split your original PST file (19.9 Gb) in three
or four new pst files; for example I have created one pst file per year
(2005.pst, 2006.pst … 2009.pst, 2010.pst).
Let me know.
BR.
Tipsandtricks4it Administrator
Thank you for your quick answer.
I want to keep 1 file only but extend the limit to 50GBs.
I’m running Win7Pro and cannot find on the regedit the Office under Policies/Windows. There are only System Certificates and Windows.
This is not normal, is it ?
Hi Shivy, could you try the following solution:
http://www.msoutlook.info/question/99
using the following location:
Outlook 2003: HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\PST
Outlook 2007: HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\PST
Outlook 2010: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\PST
Sorry, but now I haven’t here available my notebook with Windows 7 to try it.
Let me know.
BR.
Tipsandtricks4it Administrator
I’ve created the registry keys that were missing. put it to 50GB.
Now i’m just waiting to pass 20GB to be sure it worked.
It shows now on file size: 19.8GB(21,283,988,480 bytes)
Here is what you might want! OST to PST free converter demo that will give you an idea about the process of Exchange OST recovery
http://www.exchangeostrecovery.org/
Hi Lan, have you seen the URL:
– http://www.windowsreference.com/ms-office/how-to-convert-ost-to-pst-format-for-outlook/#comment-223
– http://www.recoverytoolbox.com/convert_pst_files.html
– http://www.geekstogo.com/forum/topic/188080-converting-outlook-ost-files-to-pst/
Let me know.
BR.
Admin
it is great the problem is it does not tell you WHAT VALUE to type in ??????
does anyone know what the exact kex number is – looks like that I can use to set 20gb and 19gb
Hi Joe,
10x for your suggestion/comment.
Following this URL:
http://support.microsoft.com/kb/832925
You can find the right values:
Outlook 2010
Outlook 2007 and Outlook 2003
Don’t hesitate to contact me in case any doubts.
BR
Admin
hi which data i have to put in REG_DWORD kindly send snap shot of REGEDIT
messing with registry file may land you in some serious problem so i will advice you that keep check size of ost file pst files respectively. If ost and pst files exceeds their file size limit then you have to recover thei content