[soco]

I like the idea a lot. However, putting my company data - contacts info included - in some cloud makes me uncomfortable, so please comment or add somewhere information about how you (plan to) solve things like security and privacy.

[l7l]

Hi soco, great point! We think about encryption a lot as on-prem doesn‘t make too much sense. Would that work for you?

[soco]

But I would still need to register using my work address - thus sharing it with an external service. That could still be acceptable (depending on contractual guarantees). Your cloud service will then send emails to internal users, thus it's me sharing outside the company the 1. contact addresses (which did or did not agree to above contract) and 2. email contents (up to users what they put inside). Hmm, not ideal. A MS Teams app, if you ever thought about one, would be able to use the user's own MS Graph for storage and for the contacts info, thus completely independent of external servers.

[l7l]

Great points. Didn't know about Teams apps, going to look into it. Cool!