When you connect to the Retention Review Service, some Web browsers report a certificate error if the Dynamic File Service uses a self-signed certificate. The error might continue to be reported even if the reviewers accept and install the certificate on their computers. This is a function of the Web browser and is unrelated to Dynamic File Services.
You can avoid getting this error by using a signed certificate that you have acquired from a certification authority. For information, see Section 6.8.5, Configuring a Signed Certificate for Dynamic File Services.