Organisations: Object reference not set to an instance of an object.

It shouldn't matter what the DN is for export as it just takes the first component. I'll look into the error shortly.

I've added additional logging, please try again Unify.Connectors.SharePoint.SharePoint2010WCFService.wsp

System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]: Object reference not set to an instance of an object. (Fault Detail is equal to An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:
System.NullReferenceException: Object reference not set to an instance of an object.
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.<>c__DisplayClass29.<PopulateProfile>b__22(PropertyDataContract property)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.EnumeratorExtensions.Visit[T](IEnumerable`1 enumerable, Action`1 action)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.PopulateProfile(OrganizationProfileData organizationProfile, OrganizationProfile profile, IEnumerable`1 schemaValueNames)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.UpdateOrganizationProfile(OrganizationProfileData organizationProfile, String[] schemaValueNames)
   at S...).

should there be additional info in logs?

Yes, it should have said Object null: _name of object_

How did you install the updated service? I think you have to do a different command than for the install, e.g.:

Update-SPSolution –Identity Unify.Connectors.SharePoint.SharePoint2010WCFService.wsp –LiteralPath "C:\Unify.Connectors.SharePoint.SharePoint2010WCFService.wsp" –GacDeployment

This seems better:

System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]: Object null: propertyCollection (Fault Detail is equal to An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:
System.Exception: Object null: propertyCollection
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.CheckNull[T](String objectName, T objectValue)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.<>c__DisplayClass15_0.<PopulateProfile>b__2(PropertyDataContract property)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.EnumeratorExtensions.Visit[T](IEnumerable`1 enumerable, Action`1 action)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.PopulateProfile(OrganizationProfileData organizationProfile, OrganizationProfile profile, IEnumerable`1 schemaValueNames)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.ShareP...).

Perfect thanks. Made it resilient to that: Unify.Connectors.SharePoint.SharePoint2010WCFService.wsp

I have been informed that the WSP has been installed. The error below is being returned in MIM.

Error Detail: System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]: Object null: propertyCollection (Fault Detail is equal to An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:
System.Exception: Object null: propertyCollection
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.CheckNull[T](String objectName, T objectValue)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.<>c__DisplayClass15_0.<PopulateProfile>b__2(PropertyDataContract property)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.EnumeratorExtensions.Visit[T](IEnumerable`1 enumerable, Action`1 action)
   at Unify.Connectors.SharePoint.SharePoint2010WCFService.UNIFYIdentityBrokerService.SharePoint2010OrganizationProfileService.PopulateProfile(OrganizationProfileData organizationProfile, OrganizationProfile profile, IEnumerable`1 schemaValueNames)

I asked the client to restart the service in case something was cached, but this had no effect. 

This new WSP resolved the issue.