When the Microsoft Exchange Replication (MSExchangeRepl.exe) service communicates with Active Directory in a Microsoft Exchange Server 2007 environment, Active Directory may return an LDAP_PARAM_ERROR value to the PooledLdapConnection.SendRequest function. In this situation, the MSExchangeRepl.exe process crashes.
To resolve this issue, install the following update rollup:
2655203 Description of Update Rollup 7 for Exchange Server 2007 Service Pack 3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.