Activities-->new activity-->Email. Try to add someone in the database to the cc field. Doesn't work. Tried adding via email address and by Last Name, First Name. Just searches and searches with no results. Need this functionality to be able to send tracked emails and cc other staff or other donor family members.
Per comment on the ticket I just merged into this
I just reviewed this for EFF & merged it - https://github.com/civicrm/civicrm-core/pull/15824 - pretty sure it will resolve this bug next civi upgrade - probably sooner than later since at this time of year we like to keep CIvi up to date