you need to import the CA used by SUM. You can download the HTTPS certificate inside Management > WebAdmin Settings > HTTPS Certificate > Download or import.
It was previously just the server name, but this morning I added the FQDN and then when back into 'webadmin settings' and 'https cert' then, 'import ca cert' then installed, but still the same :(
It was previously just the server name, but this morning I added the FQDN and then when back into 'webadmin settings' and 'https cert' then, 'import ca cert' then installed, but still the same :(