When I am trying to add the Second Server for the SQL AlwaysON Group, I end up with following error
After Serious Search in Internet, Found the solution which resolved the above issue
Run the Below Command in Primary Server,
Here windowstechpro\SFBDB2$ is Domain\SecondNode$
use [master]
GO
CREATE LOGIN [windowstechpro\SFBDB2$] FROM WINDOWS
GO
GRANT CONNECT ON ENDPOINT::[Hadr_endpoint] TO [windowstechpro\SFBDB2$]
GO
Run the Below Command in Second Server,
Here windowstechpro\SFBDB1$ is Domain\PrimaryNode$
use [master]
GO
CREATE LOGIN [windowstechpro\SFBDB1$] FROM WINDOWS
GO
GRANT CONNECT ON ENDPOINT::[Hadr_endpoint] TO [windowstechpro\SFBDB1$]
GO
Then tried to add the Second Node again and found I am able to add it without any other issues.