Atlassian Crowd support is preinstalled and ready to configure in Nexus Repository Manager 2.7+.
In older versions, Crowd support is implemented as an optional plugin that comes as part of any Nexus Repository Manager download. The directory containing the plugin code is called either enterprise-crowd-plugin-X.Y.Z or nexus-crowd-plugin-X.Y.Z. Install the plugin following the instructions in Section 22.1, “Managing Plugins”.
Using LDAP and Crowd Realms together in the repository manager may work, but this is not supported. If you already use LDAP support, we recommend adding your LDAP server as a Crowd directory accessible to the Crowd nexus application instead of using both LDAP and Crowd realms in the repository manager.