Hi jrebelojr65, this error message refers to the level of TLS protocol used by the site: TLS 1.0, TLS 1.1, TLS 1.2, or TLS 1.3. Recently Firefox is retiring TLS 1.0 and 1.1, but possibly your work site still uses the older version? You could take a look at the following settings: (1) In a new tab, type or paste '''about:config''' in the address bar and press Enter/Return. Click the button accepting the risk. (2) In the search box above the list, type or paste '''TLS''' and pause while the list is filtered (3) Double-click the '''security.tls.version.enable-deprecated''' preference to switch the value from false to true (4) If the '''security.tls.version.max''' preference is bolded and has a value less than '''4''', reset to the default value by clicking the button toward the right end of the row with the left-pointing arrow When you visit the site again, does Firefox let you access it now, either using the latest TLS or by downgrading to an older version of TLS?