Usage of Lookup Queries when Source Server Type is ServiceNow

When the Source Server Type is ServiceNow, the same restrictions apply as for Source Filtering (see article on Restrictions to Source Filtering when source server type is ServiceNow).

Also when both source and target servers are ServiceNow, when you compare a string value with a reference field, then the reference field is converted to the equivalent string value before the query is evaluated.  e.g.

[Title] = #src.category#

where src.category is a reference field, would convert the category reference to the equivalent string value before the query is evaluated.