Search configuration pages in some sites using Acquia Search may show messages that like this:
To protect your data, Acquia Search module is enforcing read-only mode, because it could not figure out what Acquia-hosted Solr index to connect to. This helps you avoid writing to a production index if you copy your site to a development or other environment(s).
Follow our documentation Troubleshooting multiple search cores.
The Acquia Search modules actively manage the connection to Solr depending on the detected environment conditions. A site which has a valid Solr core for one environment, may not have a core provisioned for the same site in another environment.