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+Traditionally, Bitwarden is limited to residing at the root of a subdomain, e.g. `https://bitwarden.example.com`.
+
+This limitation originates in the backend and web vault, which haven't been designed to accommodate alternate base dirs (see [bitwarden/server#277](/bitwarden/server/issues/277)). The mobile/desktop apps and browser extensions actually have no issues using a base URL with a path.
+
+In bitwarden_rs, with the changes in [PR#868](../pull/868), you can configure the backend server to work properly with an alternate base dir. With a bit more work, it's also possible to modify the web vault to work properly, resulting in a fully functional installation.
+
+## Configuring the backend server
+
+Simply configure your domain URL to include the base dir. For example, suppose you want to access your installation at `https://bitwarden.example.com/secret-path`.
+
+1. Stop bitwarden_rs.
+2. If you normally configure bitwarden_rs using the admin page, edit your `config.json` to look as follows:
+    ```javascript
+    {
+      "domain": "https://bitwarden.example.com/secret-path",
+      // ... other values ...
+    }
+    ```
+3. If you normally configure bitwarden_rs via environment variables, update your config files/scripts to set the `DOMAIN` environment variable to the base URL. For example:
+   ```sh
+   docker run -e DOMAIN="https://bitwarden.example.com/secret-path" ...
+   ```
+4. Restart bitwarden_rs.
+5. You should now be able to access the web vault at `https://bitwarden.example.com/secret-path/` (note the trailing slash). For reasons not entirely clear, you may run into issues if you use `https://bitwarden.example.com/secret-path` (without the trailing slash).
+6. Configure your apps or browser extensions to use `https://bitwarden.example.com/secret-path`. If you add a trailing slash, the apps and extensions will automatically remove it before saving.