MSExchange Web Services, Unable to send a notification for subscription

Hi all,

After we updated to Exchange 2007 SP1 to Roolup 7 our HUB/CAS server getting spamed by this event warning. Also seen af event id 5, 6 , 7

Event Type: Warning
Event Source: MSExchange Web Services
Event Category: Core
Event ID: 6
Date:  10-05-2009
Time:  21:24:06
User:  N/A
Computer: SERVER
Description:
Unable to send a notification for subscription FwBzcnZleGMwMy5hYXMuaXRzLm5qYS5kaxAAAAB2u1k3cmLBQJP2SiWXmT9t. (Send attempts: 5)

Anyone know how to fix this error?

Best Regards
Anders Jensen
andersjensenAsked:
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FearNoMoreConnect With a Mentor Commented:
Are your users using Active Sync?
These event ids are basically events that tell us that a device/client is
subscribing to a server event, but when the server tries to notify the client/device,
the client is not there to respond to it, so the server throws an errror and closes
the subscription.
Reboot the CAS servers and make sure that all ActiveSync devices are connected and check what happens
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andersjensenAuthor Commented:
Hi again,

Found the problem yesterday - a telephone-system sending SOAP request to my hub looking up calender info. Telephone-system had a bad hostname config so my hub couldn't reply back to it.

Thanks for giving me some points where to look.

regards
Anders
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