Activesync Password recovery not working

Hello all,

My environment: Exchange 2010 SP2 Rollup 2.

Mobile client: Samsung Galaxy S2 running Android 4 ICS

I created a test policy and check the box "Enable Password Recovery".

Problems that I have:

My Admin account  could not see the recovery password in the EMC\Manage Mobile Phone

Running the Shell command doesn't show the recovery password either.

Get-ActiveSyncDeviceStatistics -Mailbox:"alias" -ShowRecoveryPassword:$true

I login to Outlook Web APP using the test account and the "show recovery password" is greyed out.

Did it miss anything? Do I have to enable anything else? Does it work with Iphones/Istuffs?

Please help

Thanks.