While creating new account in groupware, the system rises the following message: "This Microsoft Exchange Account Is Already Registered. Please Specify Another Account."
SAP Cloud for Customer
Using the same e-mail address related to the same Exchange account accross different tenants is not supported.
You need to create users with different e-mail address and Exchange account for test tenant and productive tenant.
You can also check the following link from Help Portal for more information related to provisioning users in groupware: Provision Users
Groupware; Duplicated; Exchange; Account; Error; E-mail , KBA , LOD-CRM-GW-SRV , Server side groupware intergration , How To