A friend is trying to make me a member of a google group, but he's receiving an error message saying: "One person has decided to opt out of being directly added to groups".
My address is a G-suite e-mail address and I'm the administrator. I went through the settings of the admin console, but didn't find any particular setting related to this.
Why is Google Groups automatically refusing to add my address?
I asked the person to add another email address that belongs to another domain, but that is a secondary domain in the same G-suite account and this account got added normally, so this might help in diagnosing the issue.