Free Busy information – Across forest between Exchange 2007 and Exchange 2013
Exchange 2013 provides and gets the free busy information for 62 days
Exchange 2007 provides and gets the free busy information for 42 days
Due to variation of day on the request for free/busy information it will not get displayed.
To fix the issue add the “<add key=”maximumQueryIntervalDays” value=”62″ />” and save the web.config file. The web.config will be located in <Exchange Installation Path>\V14\ClientAccess\ExchWeb\EWS\web.config in all the Exchange 2007 CAS Servers.Restart the IIS service
By default, Exchange 2007 accepts availability requests for 42 days of free/busy information and Exchange 2010 may request 62 days of free/busy information. If the request exceeds the default 42 limit imposed by Exchange 2007, the request will fail.
Note: Take a backup of web.config before performing any chan