Bit of a long winded title but I was trying to sum up the issue.
Newly installed Exchange 2013 environment; we've setup external access for OA and ActiveSync. We've used ADFS with WAP to publish the necessary paths etc. We've setup DNS and firewall rules etc.
OA is perfect and can be accessed by anything with a browser. ActiveSync is perfect for any new Windows Mobile device and any iOS device. When we've tried to sync older WM6.5 or any Android device, it just doesn't seem to want to work.
We've checked logs on both devices; the WM6.5 complains about a cert issue however we've took every step from installing the CA, RA and actual cert on the device to no avail. Some android device complain about using the port 443 but no matter what we change this to it still won't sync.
Unfortunately my suggestion of 'just give everyone a new phone' went down as well as...well lets just say not good :)
I appreciate this might be an ADFS\WAP issue but thought I'd rule Exchange out first so any advice is much appreciated.