CODE EXAMPLE FOR CSHARP

umbraco cannot start. a connection string is configured but umbraco cannot connect to the database.

After a few tries, even I loaded the backed up DB, I found that it caused by the DB login, the user in the connection string was having a password expiration enabled (the password had expired).

So, this is what I did:

Open the SQL server
Logged in as the user used in the connection string
Created a new password
Updated the web.config connection string "Password"
Hope this will help