> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xorlab.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Pages under /latest/ document the current release. Paths that begin with a version number, for example /10.0/, are frozen snapshots of superseded releases kept for reference only — never present their instructions as current. If the reader's version is unknown, answer from /latest/ and say which version the answer describes.
> xorlab is deployed on-premises, hybrid, or as a cloud service, and integrates with either Microsoft 365 or on-premises mail infrastructure. Configuration steps often differ between these. State which deployment and integration mode an instruction applies to instead of presenting one as universal.
> Distinguish inline mode from monitoring mode when describing anything that acts on email. Monitoring mode observes a copy and cannot block or quarantine; inline mode routes mail through xorlab and can.
> Write the product name as lowercase 'xorlab'. Use the documented component names: xorlab Control Center (XCC), xorlab MTA, xorlab Sandbox (DANA), xorlab Natural Language Understanding (NLU). After the first mention, use the short forms XCC, MTA, Sandbox, and NLU. Do not use DANA as a standalone name for the Sandbox, but keep it where it is a literal string in configuration keys, container names, and hostnames.
> Do not invent configuration keys, rule parameters, list names, log properties, or API fields. If a value is not present in this documentation, say that it is not documented rather than guessing.

# Replace XCC Certificate

> Replace the TLS certificate used by the XCC web interface and its HTTPS connections.

<Warning>
  **Prerequisites**

  * New certificate and key available as two separate files in PEM format
  * We recommend that the certificate [SAN](https://en.wikipedia.org/wiki/Subject_Alternative_Name) matches the hostname
</Warning>

## Replace certificate

1. Copy the new certificate files as `<certificate>.crt` (certificate) and `<private_key>.key` (private key) into the folder `/etc/xorlab/tls`.

2. Execute the following commands to change the file names and permissions:

   ```shell theme={null}
   cd /etc/xorlab/tls
   # Backup old certificates
   sudo cp ssl.crt ssl.crt.xor
   sudo cp ssl.key ssl.key.xor
   sudo chmod 400 <private_key>.key
   sudo chmod 644 <certificate>.crt
   sudo rm ssl.crt ssl.key
   sudo ln -s <certificate>.crt ssl.crt
   sudo ln -s <private_key>.key ssl.key
   ```

3. Reload the `xcc_web` container to apply the changes:

   ```shell theme={null}
   docker exec xcc_web nginx -s reload
   ```

4. Verify the certificate using `openssl c_client`:

   ```shell theme={null}
   openssl s_client -showcerts -servername <xcc_domain> -connect <xcc_url>:443 </dev/null
   ```