I did this

 >curl "ldap://ldap.forumsys.com"
 curl: (62) LDAP local: No Memory

I expected the following

 curl "ldap://ldap.forumsys.com"
 DN:
         objectClass: top
         objectClass: OpenLDAProotDSE

curl/libcurl version

curl 7.65.3 (x86_64-pc-win32) libcurl/7.65.3 OpenSSL/1.1.1c (Schannel) zlib/1.2.11 brotli/1.0.7 WinIDN libssh2/1.9.0 nghttp2/1.39.2
Release-Date: 2019-07-19

operating system

Both Windows 10 and Windows Server 2016