A couple of things that you can do with ESM are: 

1. Create separate service desk instances for each business function such as HR, facilities, etc. 
   

2. Facilitate organized service delivery across your organization using code-free customizations and ITSM-based workflows. 
   

3. Maintain a single enterprise directory with all your users, service desks, authentications, and associations in one place.
   

4. Create a centralized service portal to showcase all the services that end users need based on each user's individual access permissions.   
   

Your input is important to us. So do give this feature a try and let me know what you think. 

Cheers, 

Santhosh "Santa" Mahiban