Web Forms Do Not Post If They Are More Than 1,024 KB (825071)

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry

SYMPTOMS

Custom Web forms that use the POST request do not post if the item is greater than 1,024 KB. The error message that you receive depends on your browser settings.

In Microsoft Internet Explorer, if you enable the Show friendly HTTP error messages setting in the Internet Options dialog box, you receive the following error message:

Cannot find server or DNS Error

If the Show friendly HTTP error messages setting is not enabled, you receive the following error message:

CStreamMem failed, hr=0x80080011.

If the item is less than 1,024 KB, the items post and you do not receive an error message.

RESOLUTION

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. To override the default limit, follow these steps:

Start Registry Editor (Regedit.exe), and then locate the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange\Forms
On the Edit menu, click New, and then click DWORD Value.
Name the new value FormPostMaxSize.
Set the value to the new maximum size (in bytes) that you want to use for Web Forms.

For example, if you want to increase the maximum size for Web Forms to 2,048 KB, set the key to 2,097,152 decimal (1,024 x 2,048 = 2,097,152).

Web Forms Do Not Post If They Are More Than 1,024 KB (825071)

SYMPTOMS

CAUSE

RESOLUTION

STATUS