ldaps protocol not enabled

Hi all,

On a Windows 2016 Server I used IIS's Web Platform Installer to install 
the 64 bit version of PHP 7.3. Straight LDAP connections work. When I 
look at the output of phpinfo it shows the ldap protocol as enabled but 
not ldaps. I compared it to another Windows 2016 server I have that I 
also used the Web Platform Installer to install PHP 7.3 on but it's the 
x86 version and that does show the ldaps protocol as available in the 
output of phpinfo (and I can make LDAPS connections to a domain 
controller from that second server).

Is ldaps not available in the 64 bit version? And if it is, how do I 
enable it?

Thx!

Brian