Sophos Email Appliance: Configure AD/LDAP authentication over SSL/TLS according to Microsoft's recommendation
![active directory - Can not promote server to domain controller because required ports are already in use - Server Fault active directory - Can not promote server to domain controller because required ports are already in use - Server Fault](https://i.stack.imgur.com/H6Pi4.png)
active directory - Can not promote server to domain controller because required ports are already in use - Server Fault
Error with LDAPS: "Unable to get LDAPS://<server path> The server is not operational. Check security setting."
![ldp.exe LDAPS Cannot open connection Error 81 | vGeek - Tales from real IT system Administration environment ldp.exe LDAPS Cannot open connection Error 81 | vGeek - Tales from real IT system Administration environment](http://vcloud-lab.com/files/resized/664213/500;254;10984c20f28a7be2a1ed5cccdda4bacde1ed9296.png)