iOS Exception: "Dropbox client already authorized"

Hi Robert, that assertion is actually easy enough to hit if you call authorizeFromController more than once (if you do link an account the first time). The DropboxClientsManager class is meant as a convenience for the standard single account case, so you can use the following to check if you're already linked:

if ([DropboxClientsManager authorizedClient] != nil) {

// already linked, use authorizedClient to make API calls

That's the same thing the SDK checks for that assertion, and it's set by checking the SDK's own access token storage, so you shouldn't have to worry about inconsistency there. (If you're doing your own access token storage for some reason though, you should just construct DropboxClient objects directly.)