Your netID is your identity, in many different ways -- email address, login credentials, Banner, Bluestem, Listserv lists, lists of netIDs allowed to access various files, personal URL, and more. Changing your netID is a complex, labor-intensive and time-consuming process, and despite ACCC's best efforts, can result in some service disruption. You wouldn't believe all the different machines, accounts, and files, that can contain a netid and need to be changed about the same time.
In almost all cases, ACCC must enlist the assistance of other organizations such as AITS/Banner and ITS (Medical Center Network), and work closely with them to resolve various non-trivial technical issues associated with a netID change. Approved netID changes will be implemented on a "best effort" basis with no guarantees of timeliness. Please remember that to minimize service disruption, we have to coordinate and synchronize several steps with other organizations, and that takes time.