I am about 80% through a migration from SBS2008 to exchange 2013. I’ve configured all the necessary components (to the best of my knowledge) - Virtual directories, certs, DNS etc. and am beginning the mailbox migration.
I performed a single mailbox migration from the sbs to exch 2013 database using the migration tool in exch 2013 ecp. It was successful. Outlook can connect fine and OWA works internally and externally. But when i tried to setup the mailbox on an iPhone, it failed to verify the details.
I checked the EWS and ActiveSync directory settings and they seemed fine. So I proceeded to migrate another batch of 5 (internal only users). Again outlook connected fine and OWA works as expected. I tried one of these mailboxes on an iPhone and it worked fine. So I tried the first mailbox again and it still failed. I tried another from the second batch and it worked too.
So after digging around I got no further. I needed to move on and performed another single mailbox migration. It too failed to setup on an iPhone.
I am at a point where I need to migrate the remaining mailboxes and those users only use mail via mobile devices.