The Admin Interface
The admin interface has been visually revised earlier this year and is more modern and powerful. The functionality now is reachable through a left-hand side navigation. Experienced admins will find themselves home in the set of menus available:

First Steps as an Administrator
The admin section is in the lower third of the menu and only accessible to users with the GROUPWARE_ADMIN_ROLE.
Available Users
Under the entry "Available Users", the product will show you all the users in SAP Sales Cloud that are available to be provisioned:

With the (+) sign, chose to provision a user for Server-Side Integration.
Provisioning User
The interface will display a modal dialogue, that enables the admin to chose from the organisation the user shall be assigned to and the profile it shall have assigned. Further, it allows a "Welcome e-Mail to be sent."

With the click of "Provisioning", the user will be provisioned in the system.
User provisioned

Finalizing Integration as a User
From hereon, the user should be capable to navigate to "Groupware User Settings". Users will have to have the corresponding "Groupware User" Business roles assigned.

To connect or refresh the integration with Groupware solutions, Server Side Integration offers three options: Microsoft Office365 (cloud), Microsoft Exchange (on Prem) and Google.

Here in this case, choosing Microsoft Office 365 will take the user to the Microsoft Login Page:

this step will require the user to authenticate and eventually follow security practices required to login to the Microsoft account.
After this, the AddIn should be available, the user is provisioned and ready to go!