XADM: Event Scripts Fail with Error 0x800401f0 (CO_E_NOTINITIALIZED) after Installing Exchange 5.5 SP2

ID: Q234630

The information in this article applies to:

Microsoft Exchange Server, version 5.5 SP2

SYMPTOMS

After you install Exchange Server 5.5 Service Pack 2 (SP2), applications that use Cdo.dll may start receiving an error of 0x800401F0 (CO_E_NOTINITIALIZED) indicating that CoInitialize() has not been called. The most common environment where this may be seen is with event scripts that run using the Microsoft Event Service. This problem will typically be seen with event scripts that log on to a new MAPI session from within the script.

The application event log may show events that look similar to the following:

Event ID: 6
Source: MSExchangeES
Description: An unexpected MAPI error occurred while processing binding "Script Name". Error returned was [0x800401f0].

Event ID: 16
Source: MSExchangeES
Description: Unexpected error 0x800401f0 occurred during processing of timer-based events.

CAUSE

Changes were made in Exchange Server 5.5 SP2 to allow Cdo.dll to properly support the Component Object Model (COM) Multi-Threaded Apartment (MTA) model. The Microsoft Event Service exposed a problem with these changes.

RESOLUTION

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

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

The English version of this fix should have the following file attributes or later:

Component: MAPI

File name	Version
Mapi32.dll	5.5.2622.0

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5 Service Pack 2. This problem was first corrected in Exchange Server 5.5 Service Pack 3.

Additional query words: script failure event cdo mapi unitialized

Keywords : exc55sp2 EXC55SP3Fix
Version : winnt:5.5 SP2
Platform : winnt
Issue type : kbbug