SYMPTOMS

Web mail or web admin return the error " Type mismatch: 'session' ".

CAUSE

Some security applications (e.g. IIS lockdown tool) will change these settings to harden your IIS configuration. Unfortunately this hardening often conflicts with settings that are needed by MailEnable's web applications.

RESOLUTION

To resolve this issue, (re) configure Session State Management for MailEnable's web applications.

This can be done as follows:

1. Open the Internet Services Manager from Administrative Tools
2. Select the web site that has been configured with WebMail/WebAdmin
3. Right click on the WebMail/WebAdmin virtual directory and choose Properties
4. Select Configuration
5. Select the Options tab under Application Configuration
6. Verify that both Enable Session State is selected
7. Select OK, then OK to close the properties window

More information is available at the following knowledgebase article:

http://support.microsoft.com/default.aspx?scid=kb%3ben-us%3b242425

MailEnable's web mail or web admin require that Session State Management is enabled under Internet Information Server (IIS). When the MailEnable installation creates virtual directories, the properties for the new virtual directories are inherited from IIS's global settings.

MORE INFORMATION

When accessing web mail or web admin, IIS sub-authenticator errors appear in the Windows Event Log.: http://www.mailenable.com/kb/content/article.asp?ID=ME020273

How to manually create IIS Virtual Directories for web mail: http://www.mailenable.com/kb/content/article.asp?ID=ME020080