When you are trying to configure your user in the Groupware server side integration you are facing the following message:
"ISA-024: This Microsoft Exchange Account Is Already Registered. Please Specify Another Account."
SAP Cloud For Customer
Your user e-mail address is already registered in Groupware service for a different tenant.
To prevent this message from showing up you need to completely deprovision your user from the other tenant, so you are able to configure it in a new one.
Server side; Groupware; Outlook; Microsoft Exchange; Email; E-mail; Integration; Add-in; Add-on; , KBA , LOD-CRM-GW-SCC , Invisible CRM - Smart Cloud Connect Solution , How To