XCON : Recalculating Routing does not Remove Deleted Routes

• Microsoft Exchange Server, version 4.0

SYMPTOMS

When you recalculate routing using the Microsoft Exchange Administrator program, the routing table may not reflect changes made to the routing in other Microsoft Exchange Sites.

MORE INFORMATION

For example, an address space is deleted on a connector in Site 1 but the routing table in Site 2 still shows the deleted route. This deleted route still shows in the routing table even after a number of successful directory replication cycle have been completed amongst all Sites, even though the route no longer shows in Site 2's replica of Site 1.

The current routing table can be examined following these steps:

1. Start the Microsoft Exchange Administrator program.

CAUSE

In large topologies, these routes are not being removed quickly enough. Therefore, modifications have been made to the routing calculation to strip these routes more quickly.

WORKAROUND

Within a Site, one Microsoft Exchange Server is responsible for recalculating the routing information for that Site. This Exchange Server can be determined by clicking the General tab of the Site Addressing object you opened above and checking the Routing Calculation Server value. This Exchange Server must be running version 4.0.996.42 of the Microsoft Exchange Message Transfer Agent (MTA) or above.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server, version 4.0.

A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.