Attach button does nothing in OWA on new Exchange 2010.
I am in the process of moving mailboxes from one exchange 2010 server running old hardware to be retired to a new Exchange 2010 server. The attach button in a new email message in OWA doesn't respond whereas on the old server does.
The old server is Windows Server 2008 R2 with Exchange 2010 SP3 latest update rollup.
The new server is Windows Server 2012 with Exchange 2010 SP3 latest update rollup.