I *presume* you mean an IIS cert applied to the SolarWinds Orion webserver itself. Not an IIS cert that you are monitoring using the web certificate component monitor.
SAM should continue to collect data, store it in the db, etc. The only thing that would be impacted by an expired cert is your ability to get to the Orion portal itself - meaning you'd get the usual "cert is not valid" error and you'd have to choose to navigate to the site anyway.
Which in effect means your not secure and might as well be using HTTP - This means anytime you manually input a password into the Web UI you are passing that in clear text to DB. But functionally it makes no difference to Orion's monitoring capabilities.
Will the cert have any impact on anything else? Say for instance, setting up to be able to login automatically to the web console from windows? I just want to make sure that this cert has no other impact other than what both of you mentioned above. Thank you in advance.