Exchange 2010 - List of active Outlook Anywhere users

We are in the process of migrating from Exchange 2010 to 2016.  Can someone recommend a way to generate a list of users actively using Outlook Anywhere for Exchange 2010?
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Scott CSenior EngineerCommented:
here you go....

Get-Mailbox -resultsize Unlimited | Get-CASMailbox  |select name, MAPIBlockOutlookRpcHttp
BYSAuthor Commented:
Thanks Scott.  In addition to seeing who has Outlook Anywhere, I was really looking for a list of users who are actively using Outlook Anywhere.
Todd NelsonSystems EngineerCommented:
Take a look at the following article.  It may give you what you need in reference to RPC connections.
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Jose Gabriel Ortega CastroCEOCommented:
Hi Ben, there's no way to know who is using it or not.
The only thing you can do is to get the people that have it enable it and look their lastlogondate attribute.
You can't really say if it's using OA or not since for AD it's the same that you log in to the office or outside it using OA.

You can run this script and you will get a list of all the attributes of the users in the AD. (including last logon date)

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BYSAuthor Commented:
Thanks all, by the way Outlook Anywhere is accessed externally only and the traffic first passes through ISA.  Anyone know of a quick way to filter Outlook Anywhere traffic via ISA?
Annie RoseTech LeadCommented:
Uou need to use log parser. Furthermore, below thread give you some more idea:

Exchange 2010 to Exchange 2016 Migration:
Jose Gabriel Ortega CastroCEOCommented:
Maybe with the https traffic going to the server by service
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