OL98: Allow Upgrade to Large Tables Extends Limit of PST

In Microsoft Outlook 98, a feature, "Allow upgrade to large tables," is available for Personal Folder (.pst) files. This feature increases the limit on the number of folders per file and the number of messages per folder in a .pst file. The limit has been increased from approximately 16,000 folders per file and messages per folder to approximately 64,000.

Making this Personal Folders option available causes the headers of the .pst file to be permanently updated.

NOTE: Earlier versions of Microsoft Exchange and Outlook may be able to access a .pst file that has been updated to alllow the large table format. However, this is not supported and may cause instability and corruption in the .pst file.

NOTE: The procedures for getting to the properties of your personal folders are different for the Corporate Workgroup (CW) and the Internet Mail Only (IMO) installations of Outlook 98. Refer to the appropriate section for instructions.

Allow Upgrade to Large Tables (CW)

To make this feature available in Outlook 98 (CW), follow these steps:

1. On the Tools menu, click Services.
2. Click to select the Personal Folders service, and click Properties.
3. On the General tab, click "Allow upgrade to large tables."
4. Click OK.

Allow Upgrade to Large Tables (IMO)

To make this feature available in Outlook 98 (IMO), follow these steps:

1. Right-click the Personal Folders in the Folder List, and click Properties on the shortcut menu.
2. Click the Advanced button.
3. Click "Allow upgrade to large tables." Click OK and OK.