Nintex Observer

Check If Guid is empty Filter Dynamics CRM action

Hi All,


I am using the Dynamics CRM action in nintex and wanted to know if its possible to filter on a lookup field(datatype is Guid).


I am doing a query in CRM but would like to bring back all leads where source campaign is blank. In the filter option I cant seem to find a condotion that would work. Any help is appriciated.


I just check in CRM Database and the value for Soure Campaign is NULL. I tried Is NULL and NULL and got an error stating: 

Condition for attribute 'lead.campaignid': expected argument(s) of type 'System.Guid' but received 'System.DBNull'.



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