Technical Blog Post
MAXADMIN, MAXREG and MXINTADM
Can we change the maxadmin, maxreg and mxintadmin username ?
That's not a recommendation that we can give you.
What happens is that once you change those usernames in your Maximo environment users will be already created, and Maximo installation process will probably fail with the following error message:
Error: CTGIN2080E: Process automation engine database configuration failed. The recommendation in this case, is that you do NOT change the username info for those users while installing Maximo.
Thanks and Good luck!