to enable support for PHP LDAP
I am hosting my webmail in Cloudways, and I needed PHP LDAP extensions to allow my user to change password. My email server is located elsewhere.
If you are building a web application for single identity and single sign on this is a must module. I do not understand why NOT to have it installed in our servers
Vicky Toshach commented
We are developing a training site and use Active Directory for our employees. This would be useful to allow employees to login/logout of WordPress without providing a separate login.