Count of OWA users

Hello everyone,

I have two questions:

1) Is there a way to find out how many unique users have accessed their email via OWA in the last 2 weeks?

I'll be following this article to get the answer:

http://social.technet.microsoft.com/Forums/en-US/exchangesvradminlegacy/thread/ae38a860-8b32-408d-a6f3-2dfd017186d8

Can someone please help me to find out the answer of my 2nd question?

2) And is there a way to know how many of them are only accessing their email via OWA?

Thanks,

Vik