MSExchangeTransport Event ID 952

The following error has been bugging me and I found no documentation anywhere so I am posting it here:

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Event Type:        Warning

Event Source:    MSExchangeTransport

Event Category:      Routing Engine/Service 

Event ID:              952

Date:                     04/02/2009

Time:                    1:38:42 PM

User:                     N/A

Computer:          --removed--

Description:     Subordinate routing node failed to connect to its master 

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

Data: 0000: 0000274d

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The error means that an Exchange server which is NOT a routing group master could not contact its routing group master.  In my case, my primary (and only) exchange server for some reason was not set to be the routing group master.

• Go to the Exchange System Manager.  
• Under Routing Groups > Members.
• Right click on the server you wish to be master and choose Set as Master.