We have just installed an Exchange 2013 server and created a test mailbox on it. Mail flows properly between the new 2013 server and our existing 2010 server.
We have the 2010 server as our OWA, OutlookAnywhere and ActiveSync server.
Can the 2010 server act as a front-end for ActiveSync, OWA & OutlookAnywhere for the 2013 server? So far it's not working (the Microsoft Remote Connectivity Analyzer web site says 403 Access Denied when testing ActiveSync with the test mailbox).
If this can be done, how is it done?