Customer may need to use SSL in FOM micro-services (configurator, omsServer, omsui, aopd, ope and ocs). This article explains how to do this.

You should follow for this the steps described in FOM 4.0.2 Administration guide, "SSL Configuration" section.
Hereafter the link to the documentation:
https://docs.tibco.com/pub/fom/4.0.2/doc/html/GUID-1F73E68A-711E-4929-AD1E-D088FA200C11.html
 
Note that for OMSUI, you will need to install Hotfix 1 (4.0.1-HF1) as it fixes below issue:   

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AF-8204 : Error encountered when configuring OMSUI to use SSL
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