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"Jan Smith" is returning to my small organization after a few years elsewhere. Her old AD profile ("jsmith") was deleted years ago and does not exist in Deleted Objects. We retained her network folder, so I have the SID for her old account. We haven't had any other users with her last name, so "jsmith" could only have been used for her; she has not used another name with us, so she has not had a different username here. The same applies to her long-deleted email, jsmith@company.com.

I've heard that it's bad practice to reuse AD usernames, but I couldn't find much information on why (except for the possibility of getting two individuals with the same name mixed up) so I don't know if that applies here, or if there are other reasons to avoid reassigning the same name.

If I create a new account for "Jan" and name it "jsmith" like the old one, what problems could happen? Am I overthinking a simple situation here?

Edit: The idea that usernames shouldn't be reused has come from several people I've worked with, often tied to debate on whether to delete or disable disused AD accounts. Partly because it's not uncommon for people in my industry to return to previous workplaces, I've come across lots of different perspectives on "delete vs disable" and accompanying arguments, but not so much for username reuse. I suspect it's just superstition, but I want to see what basis there might be.

mhall2896
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  • `I've heard that it's bad practice to reuse AD usernames`. Where did you heard this? I haven't heard of it in 23 years of working with AD. – Greg Askew Aug 12 '22 at 17:04

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I've heard that it's bad practice to reuse AD usernames

I've not heard that and I personally wouldn't have an issue with doing this. The only caveat is that you'll need to give her new user account access to the old network folder, or create a new network folder and copy the contents of the old folder to the new folder. Some other things to look out for are any line of business applications that may still have her username from her old user account that you may need to deal with.

joeqwerty
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  • I've heard it at two separate workplaces, plus a few years ago in college. Since I haven't found any good explanations, I suspect it's superstition and/or an extremely rare problem. – mhall2896 Aug 12 '22 at 21:37
  • Yeah, it sounds like cargo cult system administration. – joeqwerty Aug 12 '22 at 22:32