On our TMG 2010, I would like to block access to our ExchangeWebServices for Mac OS users. I searched the internet and found that you can use HTTP Signatures, to use "Client agent" information to block a connection.
For example "Client agent: Mac OS X/10.8.5 (12F45) CalendarAgent/57"
I have not much experiences with TMG and hoped that someone can help me out hier.
Any comments are appreciated.