A knowledge base article about How Do I Change My CalNet ID? provided by the UC Berkeley IT Service Hub - Knowledge Portal
You can change your CalNet ID using the tool at: https://bpr.calnet.berkeley.edu/account-manager/person/changeCalnetId.
If you are enrolled in 2-Step, you will need to re-enroll your devices after changing your CalNet ID. See https://calnetweb.berkeley.edu/calnet-2-step/how-enroll-device for enrollment instructions
If you already have a bMail address, your bMail address will be changed to match your CalNet ID. If you do not have a bMail address, one will be created for you. See https://bconnected.berkeley.edu/collaboration-services/welcome-uc-berkeley for details
Also, be aware that you are only allowed to change your ID one time, so we strongly advise you select something you intend to keep for the rest of your time with UC Berkeley.
Note: changing your CalNet ID does not impact your student and/or employee ID number.
Changes to your CalNet ID can impact your access to campus computers and online systems. When you change your CalNet ID, you change your username for systems that use CalNet ID as an identifier. A list of possibly impacted services is below. If you experience trouble with these services after changing your CalNet ID, you will need to contact the service provider or your IT support staff, directly.
Some examples of applications that might be affected include:
Active Directory
Departments who use the campus Active Directory service (network logon) also rely on CalNet ID as workstation login, and the CalNet ID is often tied to internal permissions set via AD security groups. Campus OU Administrators need to be ready to assist those users whose AD permissions need to be re-mapped for file sharing as a result of a CalNet ID change.