1 of 1 people found this helpful
Can you please have the users attempt the following to modify their display name.
1. Login into: https://id.tableau.com/profile
2. Go to > Manage Account
3. Modify first name and last name and save the changes.
4. Log out Tableau Online and back in.
More detailed instructions can be found here: https://kb.tableau.com/articles/HowTo/changing-tableau-online-display-name
Hope this helps!