Multiple LDAP domains
There is a growing need for IBM Cloud Pak® for AIOps users to be able to authenticate across multiple LDAPs. Sometimes large organizations might have an LDAP domain controller for different global regions or subsidiaries.
Users can have a mix of directory types such as AD, Tivoli, OpenLDAP etc.
Users can configure multiple directories in the LDAP configuration in IBM Cloud Pak for AIOps. IBM Cloud Pak for AIOps uses WebSphere Liberty Server OpenID Connect 
as an authentication service which does administration and authentication against the appropriate directory.
Note: Currently, IM doesn't support LDAP failover.
Multiple LDAP registration
As a cluster administrator, you can configure multiple LDAP domains by adding multiple directory entries to the LDAP configuration in server.xml.
In a multiple domain configured environment, a new user administration on IBM Cloud Pak for AIOps platform enforces a selection of appropriate domains and the user is added to the Team.
The user profile and the domain name is maintained by IBM Cloud Pak for AIOps and is further used for user management. The ability to chose domain before selecting users, such as for a team, allows administrator to isolate teams with a specific domain.
Note: User credentials are passed by IBM Cloud Pak for AIOps to WebSphere Liberty OIDC server which resolves the user domain and authenticates the user with a matching domain.