XADM: IIS Crashes with ActiveX Component Using MAPI

• Microsoft Exchange Server, version 5.5

SYMPTOMS

When you create an ActiveX in-process (DLL) component using MAPI, and use it on an Active Server Pages (ASP) with Collaboration Data Objects (CDO), the Internet Information Server (IIS) may terminate unexpectedly if two or more sessions are created by different user accounts.

CAUSE

The Emsmdb32.dll file fails to get global instance for the session when in- process components share the global instance with CDO. This causes the IIS to close.

WORKAROUND

To work around this problem, create the ActiveX component as out-of-process (EXE) or don't use CDO to access Exchange Server.

RESOLUTION

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more information, please see the following article in the Microsoft Knowledge Base:

Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

MORE INFORMATION

The Drwtsn32.log file may show a failure similar to the following. (Note especially the function names listed on the stack back trace.)

   Application exception occurred:
   App: exe\inetinfo.dbg (pid=209)
   When: 8/19/1998 @ 11:9:9.717
   Exception number: c0000005 (access violation)

   State Dump for Thread ID 0x7e

   eax=00000000 ebx=00000000 ecx=00000000 edx=00000000 esi=01fdf7b4
    edi=043effbc
   eip=6f8d2b92 esp=043efe84 ebp=00000000 iopl=0      nv up ei pl zr na po
      nc
   cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000
      efl=00000246

   function: EcReceiveDatagrams
        6f8d2b70 85c0             test    eax,eax
        6f8d2b72 750f             jnz     EcReceiveDatagrams+0xb3
                                           (6f8d2b83)
        6f8d2b74 ff157c108c6f                         ds:6f8c107c=7000178e
                                  call    dword ptr [_imp__GetLastError
                                           (6f8c107c)]
        6f8d2b7a 89442418         mov     [esp+0x18],eax
                                           ss:05dae88b=????????
        6f8d2b7e e92b010000       jmp     EcReceiveDatagrams+0x1de
                                           (6f8d2cae)
        6f8d2b83 b941000000       mov     ecx,0x41
        6f8d2b88 33c0             xor     eax,eax
        6f8d2b8a 8d7c2434         lea     edi,[esp+0x34]
                                           ss:05dae88b=????????
        6f8d2b8e 33d2             xor     edx,edx
        6f8d2b90 f3ab             rep     stosd
                                           es:043effbc=70004f4b
   FAULT ->6f8d2b92 8b4364           mov     eax,[ebx+0x64]
                                           ds:019bea06=????????
        6f8d2b95 89542434         mov     [esp+0x34],edx
                                           ss:05dae88b=????????
        6f8d2b99 3bc5             cmp     eax,ebp
        6f8d2b9b 7e46             jle     EcReceiveDatagrams+0x113
                                           (6f8d2be3)
        6f8d2b9d 33ff             xor     edi,edi
        6f8d2b9f 8be8             mov     ebp,eax
        6f8d2ba1 33c0             xor     eax,eax
        6f8d2ba3 85d2             test    edx,edx
        6f8d2ba5 7617             jbe     EcReceiveDatagrams+0xee
                                           (6f8d2bbe)
        6f8d2ba7 8b4b68           mov     ecx,[ebx+0x68]
                                           ds:019bea06=????????
        6f8d2baa 8b743910         mov     esi,[ecx+edi+0x10]
                                           ds:05dae9c3=????????
        6f8d2bae 8d4c2438         lea     ecx,[esp+0x38]
                                           ss:05dae88b=????????

*----> Stack Back Trace <----*

   FramePtr  RetAddr   Param1   Param2   Param3   Function Name
   043effb8  70004f4b  01fdf7b4 00000000 00000000
    EMSMDB32!EcReceiveDatagrams+0xc2
   043effc4  00000000  01fdf7b4 c0000005 043effc4
    KERNEL32!BaseThreadStart+0x51 

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5.

Additional query words: Exception Fault Ppcg Qfe

Keywords : exc55sp2fix
Version : WinNT:5.5
Platform : winnt
Issue type : kbbug