What is the impact on changing authentication to LDAP?

What is the impact on changing authentication to LDAP?

  
Hi everyone,

Quick question here. My environment counts with around 1600 registered users(local accounts). We are considering on integrating our Outsystems installation with Active Directory. What will be the impact on the currently created users? Will it be straight forward, or are there any considerations to have in mind?

Thanks
Nuno Silva
I can't answer your question but it's important to note that LDAP is not Active Directory.  I would be interested in the answer to this question for both of these.