Service Desk Plus to Desktop Central Prompt

Service Desk Plus to Desktop Central Prompt

Hello, we have Service Desk Plus and Desktop Central setup on the same server and both are using https: for their URL's. Every time we go from SDP to DC it does not automatically bring up the window for DC. We get prompted in IE11 that only secure content is displayed and we have to hit the show all content button. Once we do this the DC page comes up but just trying to see how to get around this. We have also added the https: url into trusted sites in IE but are still having the same  behavior. Thanks
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