In my farm I have two WFE's and two App Servers (or so I thought). I developed a Custom Claims Provider and installed to it to my farm. In the Solutions Store, I see that the solution was successfully deployed to my two WFE's and one of my app servers. My other app server isn't mentioned at all. Now on that other app server (call it app2), I'm seeing errors about the Security Token Service not being available. ULS log shows more details: It is unable to find the assembly for my custom Claims Provider. Well that makes sense since it didn't get deployed. My question is, can I ignore this error? We have the service running on the other machines so I'm guessing this is ok but I how do I supress it in the logs? Or is there a way to convince SharePoint that app02 is a WFE so that it can install the solution?