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... and I bet you can answer most of them in a way that gives your senior manager a warm and fuzzy feeling that you have it all under control. For some like the last 2, you might even present a small project plan so that your manager knows what to suspect.

Those that don't have a direct answer can be resolved by proposing a policy - such as your SLA, that mobile users will have the admin password but also their own to do their work and will 'connect as' to do admin tasks, etc. Present the draft policy with the project plan, risk analysis (the stuff in my other post) and the business case and you should be on your way.