We have seen some instances on Windows where a user’s settings do not have TLS support enabled and in this case the user will be unable to connect to certain servers. This can be fixed by:
1. On the Internet Explorer Tools menu, click Internet Options.
2. In the Internet Options dialog box, click the Advanced tab.
3. In the Security category, check Use TLS 1.0, Use TLS 1.1, and Use TLS 1.2 (if available).
4. Note It is important to check consecutive versions. Not selecting consecutive versions (e.g. checking TLS 1.0 and 1.2, but not checking 1.1) could result in connection errors.
5. Click OK
Hope that helps.