Office 365 Adding Users and Policies - Hydration Issue

Hi,

We have recently moved to Office 365 Business Essentials and although the migration was OK, we now cannot add new users or policies. On investigate a new user error comes back with Exchange: There are multiple default role assignment policies. Make sure only one policy object is marked as default and either amending or adding new policies appear to just error (please try later). Looking at the Get-OrganizationConfig within Powershell, I can see IsDehydrated is True and the ServicePlan and TargetServicePlan are different, so this appears to be a limbo state of going between Hydrated and Dehydrated or a service patch of some description. Am awaiting O365 support to come back to me, but looks like a back end problem. Any ideas? Regards Paul