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Make sure your wireless MAC has been registered on the ACM network
The ACM CA cert file can be downloaded
Unzip the the file for use.
For wireless security in network manager
It should then connect, although the first time may be slow to authenticate.
Windows 8/8.1 should be about the same procedure with a different interface to get to the initial dialogs
Connect to the wireless network and enter your ACM username and password when prompted