In Microsoft Outlook, 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 approximately 64,000 messages per folder.
Selecting this personal folders option 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 allow the large table format. However, this is not supported
and may cause instability and corruption in the .pst file.
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. To make the "Allow Upgrade to Large Tables" feature available,
refer to the appropriate section below for instructions.
Making "Allow Upgrade to Large Tables" Available (CW)
To make this feature available in Outlook (CW), follow these
- On the Tools menu, click Services.
- Click to select the Personal Folders service, and click
- On the General tab, click to select the "Allow upgrade to
large tables" check box.
- Click OK.
Making "Allow Upgrade to Large Tables" Available (IMO)
To make this feature available in Outlook (IMO), follow these
- In the Folders list, right-click Personal Folders, and
click "Properties for Personal Folders" on the shortcut menu.
- On the General tab, click Advanced.
- Click to select the "Allow upgrade to large tables" check
- Click OK and OK.