ADMT Users with a ExchangeActiveSyncDevices Child Object

We are currently migrating users from one child domain to another due to a geographical location exercise.

I have run into an interesting issue with the ADMT User Migration Wizard whereby the operation fails for any user who commonly uses an Exchange ActiveSync device such as the Nokia smartphones we use.

The ADMT log displays the following message at the end:

ERR2:7422 Failed to move source object 'CN=username'. hr=0x8007208c  The operation cannot be performed because child objects exist. This operation can only be performed on a leaf object.

This makes no sense because users are leaf objects, and shouldn't have any child objects.

Looking at this in ADSIEdit, any user who has a ActiveSync device now has a child object - CN=ExchangeActiveSyncDevices.

If the migration wizard is run on a user without this attribute then the operation completes successfully.

Is it safe to remove this object and set the phone up from scratch, or is there an approved method for migrating these accounts with the child object. There doesn't appear to be a method of doing so either from the command line, or from the ADMT itself.

Thanks in advance.

Chris Latham