When attempting to connect to your environment, Sharegate displays the following error:

The security certificate issued by [Name] to [Name] used for this connection is not valid and may be issued by an untrusted certificate authority or is expired.

This message is prompted when there is a possible security issue with the certificate. This can be caused by the certificate being expired, having the wrong host, being self-signed, having an untrusted root, or the certificate being revoked.

To resolve this issue:

Validate the certificate with your IT/Computer department in order to know why the certificate is invalid.

If you know the certificate is self-signed (since it is obtained from the enterprise intranet or an internal source) you can always choose to Allow and proceed with using the certificate. You can disable the prompt from occuring every time you connect by selecting "Always allow..." on the prompt, or changing the option in Advanced Settings.

If the certificate is invalid for other reasons, you will need to fix the issue before moving forward.