Convert string to lower case in workflow

Use the Build String Action inside of your workflow. 

That will allow you to wrap text inside of the fn-ToLower() function. 

Example using Run Now: 

I took a look at the available functions in Nintex Workflow 2016 - https://help.nintex.com/en-us/nintex2016/current/sp2016/Workflow/Reference/WFInlineFunctions.htm and fn-ToLower looks like the one you need.

Wooohooo.... there you can use the functions...!   

I was awfully looking for that.

Thank you so much nmarples‌! 

Does this solve your problem? 

Yes it did! Thanks again!

Excellent. Could you please mark it as the correct answer to help with keeping the forum searches on point for other users? 

Of course, sorry my fault.

Yeah, that's an useful overview!

One more tip if you work with older versions of Nintex: if your text can contain comma's, some of the inline functions may see it as a parameter separator and as such you need to place them within the text tags {TextStart} and {TextEnd}. For example:

fn-ToLower({TextStart}Apples, Oranges and Pears{TextEnd})