Do I need to modify Orion after changing the IP scheme in one of our offices?

I just started a new job that uses Solarwinds Orion to monitor our network. I must say I am impressed with it so far even though I have a lot to learn. We recently changed the IP schemes in several of our branches and now two of them are displaying red dots as if they are down, however I have confirmed they are up. I noticed in hovering over the servers that are supposed to be down that Solarwinds is still picking up the old IPs. Do I need to browse somewhere in Orion to manually change the IPs for each site as we change schemes?