# Could not connect to FTPS server: NotAfter

> The SSL/TLS certificate on the target FTPS server has expired. Install a valid certificate on the server.

URL: https://www.hannonhill.com/cascadecms/latest/articles/content-authoring/publishing/could-not-connect-to-ftps-server-notafter.html
category: Content Authoring
article-type: troubleshooting
content-kind: faq
release-availability: all
tags: publishing, errors, security
updated: 2026-10-06

When attempting to publish to an FTPS server, you may see a message like the following:

```bash
Could not connect to FTPS server (your.cascadecms.host:990) : NotAfter: Sat May 30 06:00:00 EDT 2020
```

This error indicates that the SSL/TLS certificate configured on the target FTPS server has expired. To resolve it, configure the FTPS server with a valid SSL/TLS certificate. On IIS web servers, for example:

1. Open IIS Manager.
1. Click the root node of the IIS server.
1. Choose **FTP SSL settings** in the right pane.
1. Choose and apply the new SSL/TLS certificate to the root node.

The date in the message is the certificate's expiry, which is useful for confirming you replaced the right certificate.