W P Staff asked 6 years ago
Exchange service do not start, following error appears in app log:
Source: MSExchange ADAccess
Event ID: 2114
Task Category: Topology
Level: Error
Description:
Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=1784). Topology discovery failed, error 0x80040a02 (DSC_E_NO_SUITABLE_CDC). Look up the Lightweight Directory Access Protocol (LDAP) error code specified in the event description. To do this, use Microsoft Knowledge Base article 218185, “Microsoft LDAP Error Codes.” Use the information in that article to learn more about the cause and resolution to this error. Use the Ping or PathPing command-line tools to test network connectivity to local domain controllers.
W P Staff answered 6 years ago
Exchange Server 2007 needs IPv6 in order to run on Windows Server 2008 (unless you completely disable IPv6). There are a lot of components that depend on IPv6.
f you decide to completely disable IPv6, follow these steps that David Chen described on TechNet Forums (I didn’t test it):
1. Open Registry with “Regedit”
2. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters
3. Create a dword (32-bit) value and name it as “Disabled Components” and then click OK
4. Double click “Disabled Components” and type 0xffffffff(hexadecimal value) or 4294967295 (Decimal value)
Please note: The above value 0xffffffff(hexadecimal value) or 4294967295 (Decimal value) will disable all IPv6 components, except the IPv6 loopback interface.