Exchange 2013 - ActiveSync issues (400 response code)

Hi,

 

We're in the process of configuring exchange 2013 on our v10.2.3 LTM. The deployment guide has been followed (as we obviously can't use the iApp). Everything is working fine....except for activesync. I set up some logging to try and capture a bit more information. When devices try and hit activesync, we're seeing a 400 http response eg.

 

Client: xx.xx.180.113:38682 -> VIP:yy.yy.1.193:443 mail.domain.edu.au/Microsoft-Server-ActiveSync?Cmd=Ping&User=user111&DeviceId=android946692190700&DeviceType=Android -> Node: xx.xx.2.10:443 with response 400

 

I was wondering if anyone else has experienced an issue similar to this and may be able to offer some guidance?

 

Thanks