Users receive an error creating appointments on shared calendar when connecting to OWA via an ISA Server: "The request was rejected by the HTTP Security filter"

This article applies to the following products:
     Messageware CalendarShare 2003 v2.5

     Messageware CalendarShare 2000 v2.5

 

  SYMPTOM

 

When a user opens an international shared calendar and creates an appointment, they receive the below error:

 

“Error Code: 500 Internal Server Error. The request was rejected by the HTTP Security filter. Contact your ISA Server administrator. (12217)”

 

RESOLUTION

 

The error is unrelated to Messageware CalendarShare. When configuring the HTTP filter in ISA to block high-bit characters, URLs containing characters from a double-byte character set (DBCS) or URLs that contain Latin 1 characters, are blocked.

 

MORE INFORMATION

 

Refer to the Microsoft knowledgebase article below to obtain a resolution to this issue.

 

You receive a "The request was rejected by the HTTP Security filter" error message when you try to open a message from an Exchange Server that is published in ISA Server

http://support.microsoft.com/kb/837865

 

 

This article applies to the following products:
     Messageware CalendarShare 2003 v2.5

     Messageware CalendarShare 2000 v2.5