Event ID - 951

Event Id951
SourceMSExchangeActiveSyncNotify
DescriptionWhen sending mail to following address server name, we have found the connector with target domain %2 matching destination address exists in DS. However, we have no way of getting there. Possibly, you need to check your topology and add appropriate connectors among Routing Groups.
Event InformationAccording to Microsoft:
Cause:

This Warning event indicates a problem with the link state table or with the routing topology. The link state table is used to determine the most appropriate route for a message, based on cost and availability.
If the link state table becomes corrupted, mail flow problems such as delayed mail or non-deliverable mail can occur. For example, a link state table can become corrupted because of such issues as Active Directory replication latency and connectors being created and deleted at the same time.
User Action:
To resolve this event, try one or more of the following:
1. Verify your routing topology using the WinRoute tool.To download the Win route tool click the link "Exchange Server WinRoute".For information about how to use WinRoute see the Article Q281382.
2. Verify that all connectors are configured correctly and started. If you have to, create new connectors or re-create deleted connectors.
3. Make sure that link state information is being correctly replicated to all servers in your organization.For more information see the link Q842026.
Reference LinksWhen sending mail to following address server name, we have found the connector with target domain %2 matching destination address exists in DS.

Exchange Server WinRoute

Q281382:How to use the WinRoute tool

Q842026 :Routing status information is not propagated correctly to all servers in Exchange 2000 Server or in Exchange Server 2003

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