Made RecipientType not required (with a default value of User).
Fixed filtering out Exchange attributes when adding an object of User kind.
Worked around of PowerShell behaviour causing application of address policy even if it is turned off on user creation.
Added support for ExtensionCustomAttributes1-5.
Eliminated execution of empty Set-* PowerShell commands.
Re-included debugging information in the connector.
Fixed NPE when setting attribute to null.