My software team member A belongs to another company B, we use JIRA to track project progress, and compay B also have independent JIRA program.
Previous A use XXX@AA.com to login my company's JIRA, and use XXX@BB.com to login his company's JIRA.
Now A's mail XXX@AA.com will inactive, so I suggest him to change mail account to XXX@BB.com in my company's JIRA, face error as attachment.
I'm not sure it means one mail account can't login 2 different company's JIRA? How can we help he to login now