Lookeen may misbehave with isolated Outlook. Error comes from LookeenBase.dll from Lookeen.OutlookConnector.InitRedemption on this._RedemptionSessionCOM.MAPIOBJECT = OutlookConnector.OutlookNamespaceCOM.MAPIOBJECT; Error description is Interface not supported at Redemption.IRDOSession.set_MAPIOBJECT. According to Google, it's a bug in Redemption library and has nothing to do with ReHIPS.