If you need to find an Active Directory user when all you have is the objectGUID, you can do so with PowerShell.
Grab files that were created in the last day and get the newest one.
This simple snippet reads a file named “readlines.txt” line by line, assigns the line to a string called “$line”, then prints it out on the screen.
I use this snippet in the footer of my WordPress sites. The year automatically updates. So you never have to worry about changing it every year.
Query all domain controllers for users with a blank “mail” attribute and if the user is enabled/disabled, then export a CSV list for each user that is found. Replace “mail” with whatever attribute you would like to query.