If you do not want to write groovy post function scripts, you should be able to use a combination of the Insight post functions like this:
Haven't tried it, but should work.
I need to update multiple attributes, most of which are text from fields on the Service Desk Issue. Some of these fields are date fields.
1) I need to look at an Insight Object to see if a field value exists in the Name field of the Object. If the Object already exists, I need to update several fields from the SD ticket.
2) If the Object does not already exist, I need to insert a new record and populate the values from the SD ticket.
Thank you, @Crystal Rouse
There are some special Insight post functions available, but since Insight object is not stored in the issue and you need to search for it, you won't be able to use them.
So, I think, the only possible way is to create your own groovy script post function.