Enter transaction code SPRO, then display the SAP Reference IMGproject (or the project applicable to your organization).
Based on the SAP version you are using, perform one of the following:
For SAP HR 4.6, click Basic Components > Application Link Enabling (ALE) > Sending and Receiving Systems > Logical Systems > Define Logical System.
For SAP HR 4.7, click SAP Web Application Server, > Application Link Enabling (ALE) > Sending and Receiving Systems > Logical Systems > Define Logical System.
For SAP HR 5.0, click SAP Netweaver > SAP Web Application Server > IDOC Interface/Application Link Enabling (ALE) > Basic Settings > Logical Systems > Define Logical System.
For SAP HR 6.0, click SAP Netweaver > Web Application Server > IDOC Interface/Application Link Enabling (ALE) > Basic Settings > Logical Systems > Define Logical System.
Click Edit > New Entries.
Enter a name and a description for the logical system you want to create (IDMGR).
Save your entry.