PeoplePicker search returns results from both directories

Products

• CA Single Sign On Secure Proxy Server (SiteMinder)
• CA Single Sign On SOA Security Manager (SiteMinder)
• CA Single Sign-On

Issue/Introduction

We have SharePoint 2016 integrated with db2 and AD. When we search a user we are receiving results from both the directories where as the requirement is to return results from just the one where the user is logged into.

Environment

Release: ESPSTM99000-12.51-Single Sign On-Extended Support Plus
Component:

Resolution

People Picker will show results from AD for every TIP regardless of configuration, so AD results will be included in every search.  There is no way to avoid this.