terminated / locked licensed accounts
CSM/CAM Version : CSM 9.1

I have a recurring task where I have to do account management to ensure that licensed accounts for terminated (or transferred) employees are locked.

I am not 'deleting' licensed accounts because I do not want to affect tickets that were resolved/assigned to former-agents.

I just realized that next year when I perform this activity, I will be unable to indicate which accounts have already been reviewed. Does anyone have a best practice or a suggestion for this? How do you manage accounts?

Side question: Can I make changes to the User Information table (for example; create my own date field) without affecting anything?