Library computer showing unknown account

[Shannon33743777ta3o]

Hello! I hope this is the best place to ask this question, our IT company did not really answer when I asked them. 
I work for a public library and patrons frequently open Acrobat to read their PDFs. I had a patron very distressed because at the top right of her document, there was an unknown man's account. She was very upset and concerned that this man now had access to her resume. Our computers do have features that restrict changing settings, and we do not have Pro if that helps. There was nothing I could do on her end to get rid of this account other than logging him off. She was furious.
If a patron sees another account name when they open a document, does that other account have access to the opened file? What can I personally do other than keep bugging IT to try to make it so Adobe logs patrons off automatically? I do know about the ability to make a document private on her account now, but can someone else that is still logged in see her file?

[radzmar]

You should try to disable the login feature completely since there's a chance that documents get in wrong hands when using Acrobat/Reader where onother user is already logged in.

https://community.adobe.com/t5/enterprise-teams-discussions/disable-signin-sign-out-adobe-acrobat-dc...

[try67]

> can someone else that is still logged in see her file?

Normally, no. If she didn't specifically save the file to the cloud it would only have been viewed locally and the person whose account the application was logged into won't have access to it.