We recently federated Portal and server and I inadvertently deleted a service registration. The service still exists on the Server and I'd like to force a new registration rather than delete and republish. I've done some searching and have had no luck finding how to, but I figure there has got to be a way.
Do I manually re-register and embed admin creds? Is there a handy-dandy tool I can run on one service?
You can try to add the service back to your Portal manually, but don't select to embed credentials. Take the new item ID for the item in the portal and then within the Server Admin API, update the itemID property with the new item ID:
By doing that, you'll create a new item in the portal and make sure that Server is updated with the new item ID.