SEMblog

For some reason, the act of approving a quarantined device using EMS isn't immediately obvious. It took me a little while to work out how to do it. 

This command will show you what devices are quaranted:

Get-ActiveSyncDevice -filter {deviceaccessstate -eq 'quarantined'} | select identity, deviceid | fl

Therefore it would seem that set-activesyncdevice would be the correct command to use to approve the device. 

Not so. 

It is actually set-casmailbox. 

Take the device ID from the first command, you use it to complete this second command: 

Set-CASMailbox –Identity user@example.com –ActiveSyncAllowedDeviceIDs DEVICEID

Give it about 15 minutes and the device will start to get email.