Regarding the relationship between content such as dashboards published on the server and connections (connection information) for data source connectivity, if they use the same connection, republishing will update the connection information for content using that same connection.
Therefore, if you have three dashboards as shown below and you change the authentication information for Connection A and republish Dashboard 1, Dashboard 2 does not need to be republished because it uses the same connection information.
- Dashboard 1 (uses Connection A)
- Dashboard 2 (uses Connection A)
- Dashboard 3 (uses Connection B)