Quick Tip: Just created a Resource Pool in vSphere and can't see it in vRA/vCAC Reservation form?

Have you just created a Resource Pool in vSphere, so that you can assign it to a vRA/vCAC Reservation, but can't see it in vRA/vCAC's Resource Pool list?

This is because vRA's vSphere Data Collection doesn't run continually;
For Inventory look ups, it runs daily.
For State look ups, it runs every 15 minutes.
For Performance look ups, it runs daily.

To force it to run so that it can see your newly create vSphere Resource Pool;
Log in as a Fabric Administrator, then go to the Infrastructure tab.
Navigate to Compute Resources, and click Compute Resources once more.
Hover over your Computer Resource so the actions menu appears, then click Data Collection.
In the Inventory section, click Request Now.
Wait a few minutes.

You should now be able to go back and create your Reservation, this time you will see your newly created vSphere Resource Pool in the Resource Pool list.