Microsoft 365 was deployed at our company a couple years ago and since there have been some shifts and mergers. The Yammer - All Company community doesn't include all members of the company. We have tried manually uploading and adding them via an O365 group. The catch is that many of the users apparently haven't logged in before. Does anyone have any ideas on how to make this happen with a few thousand users? We've thought about a corporate communications that would ask for this action but are concerned that many wouldn't read or do so. Thoughts?