API v2 If-Modified-Since not working

API v2 If-Modified-Since not working

Hi,

I'm using the below connection string with a REST connector to GET data

url=https://www.zohoapis.com/crm/v2/Projects
;timeout=30;method=GET;autoDetectResponseType=true;keyGenerationStrategy=0
;authSchema=basic;skipServerCertificateValidation=false;useCertificate=No
;certificateStoreLocation=CurrentUser;certificateStoreName=My
;queryParameters=page%21%1per_page%2200
;queryHeaders=Authorization%XXXXXXXXXXX
%1If_Modified_Since=2019-12-15T00:00:00+11:00
;PaginationType=None;allowResponseHeaders=false;allowHttpsOnly=false
;XUserId=XXXXXXXX;XPassword=XXXXXXXX;

It works fine except the If-Modified-Since header. I get an error if I use hyphens in If-Modified-Since, however if I replace the hyphens with underscore or if I remove the hyphens, then I don't get the error, but the data set is not limited to the records modified since the entered date.

How can I correct this?

Thanks in advance,
Michael