Matt's utility worked perfectly for me to go from ICS to 173. I run Ubuntu 11.10 64-bit. I believe there is a slight driver incompatibility for the win version
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Again. Hit or miss. You apparently are a hit. There are many many misses as well.
I am actually on exchange, everything works on 6.12.173 as soon as I type my address and password it configures account. After applying update phone never get synchronized and mailbox does not get configurations. I have tried twice, with or without complete reset. Is there a trick configuring exchange on ICS? My Xoom running ICS and email works though.... Could you help?
I just used the built-in setup after I'd done a factory wipe after installing ICS so I was working from a clean slate. I also restore nothing other than what auto-restores from google to prevent database/incompatibility issues. As dumb as it sounds, are you sure you've got the server info entered right? I had forgotten a digit or the fact that my login was with my @blah.com instead of just the username a few times during various setups. Domain settings maybe? Dunno. All I know is it works. If your auto-setup is failing, try manual.