Remove browser security popups regarding SSL certificate revocation when accessing ArcGIS Online or ArcGIS Online resources

Summary

When accessing ArcGIS Online or resources from *.arcgis.com or *.arcgisonline.com, some users may be prompted in the browser with a popup with wording similar to the following:

Revocation information for the security certificate for this site is not available. Do you want to proceed?

Procedure

The certificate revocation list (CRL) for the SSL certificate of *.arcgis.com or *.arcgisonline.com is inaccessible, which causes browsers to assume the SSL certificate has been revoked and is no longer valid.

By looking at the details of the SSL certificate, one can find the Certificate Revocation List URL. Adding the fully qualified domain name of that URL to the trusted sites in the browser or on a similar allowed list for forward proxies allows the CRL to be accessed by the browser, thus getting rid of the security prompt.