This issue may occur if one or more of the following conditions are true:
- The connection to the server requires a certification authority (CA).
- You have not trusted the certification authority at the root.
- The certificate may be invalid or revoked.
- The certificate does not match the name of the site.
To resolve this issue, use one of the following methods for outlook recovery.
- Install the trusted root certificate
-
https://outlook.recoverytoolbox.com/