You would like to change the user IDs in the e-mail integration without having to provision again all users.
SAP Cloud for Customer
It's currently not possible to change user IDs without deleting users and provisioning them again.
This is the standard behavior of the system.
If you need this functionality urgently you may contact your implementation manager to help with such request or approach directly the SAP Cloud Service Center.
You can find more details about the services offered by Cloud Service Center. You can contact Cloud Service Center as follows:
If you are a partner: please use firstname.lastname@example.org or the Partnerfinder
If you are a customer: please use the little blue box “Contact Us” shown on the very right hand side of SAP Application Development site, choose “Contact Us”, choose “Services”, choose “SAP Custom Development” and complete the page.
Note: The services of the SAP Cloud Service Center will be charged as packaged services based on fixed prices.
An alternative option may be to check the SAP Customer Influencer Site to submit an idea.
Change; E-mail; User; ID; , KBA , LOD-CRM-GW-SCC , Invisible CRM - Smart Cloud Connect Solution , How To