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In Microsoft Dynamics CRM 4.0, your user account is in a child business unit of a parent business unit. When you recieve an e-mail message from a user in the parent business unit, you cannot open the e-mail message.
Additionally, in the debug environment, you receive the following error message:
SecLib::AccessCheckEx failed. Returned hr = -2147187962., ObjectId: GUID
Note In this error message, GUID is a placeholder for the actual GUID.
This problem occurs even if you have a role whose Read permission for the Activity entity is set to Parent: Child Business Unit.
In Microsoft Dynamics CRM 4.0, your user account has the User Read privilege on Activity. Additionally, your user account is an attendee on an appointment and appears as Required or Optional.You do not see the related appointment.
This problem is fixed in the latest cumulative update rollup for Microsoft Dynamics CRM 4.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
949256 Microsoft Dynamics CRM 4.0 updates and hotfixes
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the terminology that is used to describe Microsoft software updates, click the following article numbers to view the articles in the Microsoft Knowledge Base:
824684Description of the standard terminology that is used to describe Microsoft software updates
887283 Microsoft Business Solutions CRM software hotfix and update package naming standards