To check if our SQL Server instance registered its SPN and to register if not.
My way of achieving it
Sometimes when troubleshooting connection issues we end up realizing that it was caused due to Kerberos and the solution is to check for SPN and to create it in case is not there. Because the creation requires the knowing of the port under which SQL Server instance is listening and also the service account under which the service is running I found useful the usage of a script that will generate and check the existence and the creation of this SPN. The script can be executed in powershell console and I prefer the one that you can open while you are using SSMS and from contextual menu you choose Start Powershell.
The output of the script looks like below
The script can be downloaded from here