If ActiveSync does not work with a device, many people first delete the Active Sync account on the device and create a new one. This often helps, but not always. People often forget that Exchange creates a partnership for each ActiveSync device. In the event of a software update, it can happen that this partnership no longer works. In this case, it helps to delete the account on the device, then delete the partnership and recreate the account on the device. Here is the howto for resetting the ActiveSync partnership:
Display the current Active Sync devices in Exchange 2013:
Get-MobileDevice -mailbox frank | ft
or with
Get-MobileDevice -mailbox frank | fl friendlyname,identity
Delete the partnership:
Remove-MobileDevice -Identity „frankysweb.local/FrankysWeb/Benutzer/Frank….”
and the same for Exchange 2010:
Get-ActiveSyncDevice -mailbox frank | ft
and delete with
Remove-ActiveSyncDeviceb -Identity „frankysweb.local/FrankysWeb/Benutzer/Frank….”
Once the partnership has been deleted, the device can be set up again.