REST POST API call not working on the Mendix Cloud

Hello, I’m trying to call to an external API call which works fine when running it locally but always times out when trying to run it on the cloud. The Request is using a Custom Request Template which is using a parameter from an Export Mapping activity (the export mapping uses XML) and the Response is being stored in a string variable. I have custom headers on the REST call which is: The version of Mendix I am using is Mendix Studio Pro 8.7   Can anyone offer any advice of what is causing this to time out of the cloud but work fine locally? Many Thanks, Christina
1 answers

Is there any kind of IP whitelisting on the external system or a needed certificate which is in place locally but not in the cloud? Are there any leads in the log or just a read time out?