Event ID 1503 and OMA   

Hi All,

I have a single Exchange 2003 SP2 Server that is also a GC running Windows 
Server 2003 SP1.

The Server is setup for forms based authentication and requires SSL for OWA.

Access to OMA is not working with the follwoing event being logged on the 
exchnage server everytime the OMA app fails.

Event Type: Error
Event Source: MSExchangeOMA
Event Category: (1000)
Event ID: 1503
Date:  02/06/2006
Time:  14:24:51
User:  N/A
Computer: FLINTJACK
Description:
An unknown error occurred while processing the current request:
Message: Input string was not in a correct format.
Source: mscorlib
Stack trace:
   at System.Number.ParseInt32(String s, NumberStyles style, 
NumberFormatInfo info)
   at System.Web.Mobile.MobileCapabilities.get_ScreenCharactersWidth()
   at Microsoft.Exchange.OMA.UserInterface.MainMenu.OnInit(EventArgs e)
   at System.Web.UI.Control.InitRecursive(Control namingContainer)
   at System.Web.UI.Control.AddedControl(Control control, Int32 index)
   at System.Web.UI.MobileControls.MobilePage.AddedControl(Control control, 
Int32 index)
   at System.Web.UI.ControlCollection.Add(Control child)
   at Microsoft.Exchange.OMA.UserInterface.Page.Page_Load(Object sender, 
EventArgs e)
   at System.Web.UI.Control.OnLoad(EventArgs e)
   at System.Web.UI.MobileControls.MobilePage.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain()

Message: Exception of type System.Web.HttpUnhandledException was thrown.
Source: System.Web
Stack trace:
   at System.Web.UI.Page.HandleError(Exception e)
   at System.Web.UI.Page.ProcessRequestMain()
   at System.Web.UI.Page.ProcessRequest()
   at System.Web.UI.Page.ProcessRequest(HttpContext context)
   at 
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication+IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& 
completedSynchronously)


Also get the following in IE 6.0 SP2

A System error has occurred while processing your request. Please try again. 
If the problem persists, contact your administrator.
Home

For more information, see Help and Support Center at 
http://go.microsoft.com/fwlink/events.asp.

I have been through KBs 817379, 842119, 898131 all with no resolution.
The server is patched up with no critical downloads available from Microsoft 
and has the following hotfixes:
907747, 911829, 916640, 916803

The server is also running Trend Micro Scanmail version 7.0 with the latest 
pattern files and updates applied. I cannot find anything in Trend Micro 
KB's on this issue and there are no warnings of any virus detections in 
either this or the file virus scanner which is Symantect Anti Virus version 
10.1.0.394 and it is excluding the exchange directories.

Interestingly if I test this locally using localhost/oma it works perfectly 
well until I try this remotely from another server, then after the failure 
from the other server I get the issue locally as well and OMA stops working.

So it appears that something remotely is causing the OMA application in the 
ExchangeMobileBrowseApplicationPool to die. Recycling the app pool allows me 
to restart the application and this works again locally. The identity for 
this application pool is correctly set to Network Service.

I have have no host headers and although ASP 2.0 is installed the Web Sites 
are all set to use ASP 1.1.

OWA works perfectly, I cannot test ActiveSync as I have no device and I have 
not setup an emulator.

It seems to me OMA is not as robust as hoped as there are still lots of 
issues arounf event ID 1503.

Any help appreciated.

Andrew

date: Tue, 6 Jun 2006 10:48:41 +0100   author:   Andrew Campbell-Laing