As far as I know, you can login tableau server using the same account in different machine.
A user is able to log in to or have multiple active sessions in Tableau Server or Tableau Online. For example, I can log in to my Tableau Server using the same account in multiple browsers or on my laptop and on my Sandbox at the same time to test and compare the way a view renders in multiple environments.
Hi Vanessa, thanks for the reply, so is there any limitation on how many times can one single license be access to Tableau Online/Server with multiple machines (different laptops) at one single time?
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There is no limitation to how many separate machines can be used to log in to Tableau Server at one single time. A user may be logged on to Tableau Server with their credentials on multiple laptops, via Tableau Mobile, etc, at the same time with no issues.