Inner ExceptionException type: Microsoft.Exchange.Data.Directory.InvalidADObjectOperationExceptionException message: Property Languages cannot be set on this object because it requires the object to have version 0.1 (8.0.535.0) or later. Current version of the object is 0.0 (6.5.6500.0).
Se debe a que el buzon esta creado con Ex03, en Ex07 aparece como legacy mailbox, para convertirlo a user mailbox:
set-mailbox Alias -applymandatoryproperties