We had mail issues which caused verification emails from not being sent out. The mail issues have been resolved, but we now have a dozen or so users who are unverified, and I'm guessing that this is why they are not getting email updates on boards/cards for which they are tracking. Users who have verified accounts have no issues receiving updates.

Is there a way to have the system resend the verification code, or as an admin change the verified flag to yes?

We are running a snap install of version 1.50.0