How to reassign tickets from old user (AD) to the new user (Azure AD) using script runner. Edited

[Sheen]

Our Jira is integrated previously with Active Directory but we will using Azure AD moving forward.

Is there a way that I can reassign existing tickets from the old user (LDAP) to the new user (Azure AD).

For example:

The credentials in LDAP is Username: hpotter and Email: hpotter@email.com

In Azure AD it is now Username: hpotter@email.com and the email is still the same hpotter@email.com

What I want to do is to assign the existing tickets assigned to the old user "hpotter" to his new user "hpotter@email.com".