SSRS no longer understands alternate subject names

[SomeTroglodyte]

Sql 2016 reporting would accept a certificate listing e.g. the short form plus the fqdn of a box as alternate subject names, and build bindings for all of them. (Mine also listed a cname short+fqdn).

SSRS 2019 will only bind the principal suject name. Manually adding the missing bindings and mapping them to the same cert in the xml will result in the service not starting.

Workaround: Order one certificate per needed binding - needlessly expensive in terms of maintenance and human error during the next migration... Unless you work on a public CA in which case that translates to actual money.