I have found that we have a free instance of Jira set up prior to my arrival. The original user is gone. I have been able to get myself access to the Atlassian Admin account, however when I attempted to invite other users, the invite is never received. I believe this may be why I cannot grant myself site admin rights to Jira, which is precluding me from configuring Jira in the manner we need. Do I need to verify the company domain or set up email delivery in order to add members or otherwise enable myself or someone else to become the admin of Jira?