This event may be accompanied by an inability to start
the Microsoft Exchange Information Store service. The actual error code in the description
section might vary, depending on the underlying cause of the problem.
This problem occurs because a server name that is not valid is passed into
the Microsoft Exchange Routing Engine. When the Microsoft Exchange Information Store service starts, it makes a call
to the Microsoft Exchange Routing Engine (through Reapi.dll) to build the routing table. If a
server name that is not valid is passed into Reapi.dll, the Information Store
service does not start, and this and several related events are logged in the
application event log.
Event Type: Error
Event Source: MSExchangeIS
Event Category: General
Event ID: 9538
Description: Error 0x80070057 calling StrInitialize in REAPI.DLL.
Event ID 5000, 7024, 9098
There could be varied causes for this event, but the following are the most common:
Multiple recipient policies are displayed with the same priority.
A Microsoft Exchange Server 5.5 site was removed from the organization, but it is still partially listed in the Exchange System Manager.
Some values are missing on the Server object Network Address attribute in Active Directory.
The Exchange Domain Servers group does not have the appropriate permissions in Active Directory.
Check to ensure that the recipient policies do not all have the same priority.
Verify that if any Exchange Server site was removed, it no longer shows up in Active Directory.
Verify that the various values on the Network Address attribute for the Server object are present in Active Directory. Compare with a working server, if possible.
For more information about MSExchangeIS event 9538, see:
Exchange Server Error and Event Messages
Microsoft Knowledge Base