I manage technology within a large state University that utilizes Junos Pulse to access ALL enterprise systems (including SharePoint). I maintain a dual mobile environment between Windows Phone and iOS. I am losing support amongst my leadership for Windows Phone because of the inability to reach our enterprise systems.
Rather than suggest that we as clients pressure the vendors, Microsoft needs to reach out to vendors to help them transition to this platform as quickly as possible. Microsoft has much more to benefit from this than the vendors. We have other products to choose from that will allow us to use these 3rd party vendor VPNs. Unfortunately, the excellently designed Surface and Windows Phone 8 devices are not currently among the product list.
I understand that we will have more options available when the Surface Pro becomes available. However, price and size make this model a different application. Furthermore, I cannot stress enough how enterprises have run out of time to move forward in this space. We are sadly going to have to leave Microsoft behind very soon.