I am working on migrating users from Exchange 2007, to 2013 and have found that users with mailboxes in the new environment, are unable to view free/busy information of users with mailboxes in the old environment.
When I try, Outlook says, "No free/busy information could be retrieved" and "The recipient's server could not be contacted." Both environments are in the same AD domain. I verified that the 2007 users can still see free/busy info for 2013 users.
I found this TechNet article, and had a look at my 2007 web.config file. The directions say to find the "appSettings" section, but I only have an "<appSettings />". I was confused by the escape slash, so I tried the config file two ways.
One:
<appSettings> <add key="maximumQueryIntervalDays" value="62" /> <appSettings />
Two:
<appSettings /> <add key="maximumQueryIntervalDays" value="62" />Of course, I restarted IIS Admin after both changes, but they didn't help. Any other ideas?
Thanks.