Exchange 2007 nach Exchange 2010 Migration FreeBusy-View-Option-Fehlermeldungen

Im Anwendungslog steht folgender Fehler:

Product: Exchange
Event ID: 4002
Source: MSExchange Availability
Version: 8.0
Symbolic Name: ProxyWebRequestFailed
Message: Process %1: %2 failed. Caller SIDs: %3. The exception returned is %4. Make sure that Active Directory site/forest containing the user mailbox has at least one local Exchange 2007 server running Exchange Availability service. Turn up logging for MSExchange Availability service and test basic network connectivity.

Im Text kommt zus. folgender Text vor: FreeBusyViewOptions.TimeWindow is too long.

Auf den CAS 2007 Servern muss im IIS folgender Eintrag hinzugefügt werden:

Expand the Default Website
Select the EWS virtual directory.
Double click Applciation Settings
Add a new application value:
Name: maximumQueryIntervalDays
Value: 62
Click OK..

Make the change on all the 2007 CAS servers. You should see the 4002 event go away.