fixed issue with hyper link being null

Author: AdamG100

docs/getting-started/initial-configuration.mdx

@@ -87,7 +87,7 @@ Click on **My Profile.** Enter your email and select your time zone. All times s
 
 ## Enable support for Let's Encrypt
 
-[Follow these instructions](http://null)
+[Follow these instructions](/using-tcadmin/server-management/lets-encrypt/#configure-lets-encrypt)
 
 ## Mail Server Configuration