Set email for reporter without account

[UC IT Solutions Center]

Hello,

We have a project that migrated from JIRA Server and did not allow for reporters without accounts so we have a custom field with the email of the reporter on every issue.

Two questions:

1. Is there a way to set the reporter as an email of a user without an account? I know you can do this using the customer portal (see below screenshot) but I need to do this retroactively
2. If so, is there a way to do this in bulk based off this custom reporter_email field?

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[Nic Brough -Adaptavist-]

No, the whole point of an anonymous record is that you do not know who they are.  There's actually nothing to put an email on, because you can't identify them.

[UC IT Solutions Center]

Hello, I think I may not have articulated my question correctly. I've inserted a screenshot below of a ticket raised from the anonymous portal for my project. What I'm looking to do is update the reporter field to be an email for a user without a customer account 

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