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
- For Outlook 2003
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.
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