Is your feature request related to a problem? Please describe.

Currently, invitation are separate from Users service and users don't get notified via email once someone send them an invitation to join the domain.

Describe the feature you are requesting, as well as the possible use case(s) for it.

I'd like that user gets notified via email there is an invitation waiting for them.

Indicate the importance of this feature to you.

Must-have

Anything else?

No response