Hi Jake, Depending on your situation and what is considered missing/offline, it is best to start at the folder level (if entire folders show as missing) and at the highest parent folder, so that by simply reconnecting that folder you reconnect all photos and folders within that parent folder. If the folders show as online/available in the Folders panel and you just have individual photos missing within a given folder, then reconnecting at the individual photo level can only “look” for nearby photos within the folder where the selected photo resides.

One question: I’ve used the “Find Missing” command but it only seems to work for the one folder I’m working in at a time. The surrounding folders don’t seem to get updated.

Is there anyway to “expand” that locate nearby photos command to the entire library?

You can either rename them back using Finder to what they were originally (essentially undo-ing what you did), or you can reconnect the catalog to each photo one at a time. As a last resort, you can remove them from the catalog (losing any work you may have done inside of Lightroom) and then import them as new photos. If you have not done any work inside of Lightroom then the last resort is the easiest and fastest option. If you have done a lot of work inside of Lightroom, then you need to pick the least worst option of renaming or reconnecting.