One of the coolest features unique to SharePoint Online is the ability to share sites with external users. I’ve noticed the functionality was there throughout the beta but I believe I hadn’t actually been able to get it to work until GA. Even then, it took checking a number of settings before I could actually get it to work.

It happens to the best of us. Sometimes, we just need to start over. A lot of times, I see cases in the forums where it is just easier to reinstall the Search Service Application. This especially applies to new environments or when someone ran the dreaded “wizard” to set up their service applications. This serves as a quick reference guide on how to re-create your Search Service Application.