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Tableau Server Upgrades
Windows versions of Tableau Server starting with 2018.2 come with a new web-based server configuration utility called Tableau Services Manager (TSM). Upgrading from 2018.1 or earlier to a newer version will require special steps in order to upgrade successfully. Please see this article for instructions on what has changed to ensure your upgrade experience goes well. The latest releases of Tableau Server 2018.2 and Tableau Server 2018.3 can be found on the Tableau Server release page.
Release Notes for Tableau 9.1.5
This release addresses an issue found in Tableau Server 9.1.4 (9100.16.0114.0755) for some environments configured to use Active Directory. A change to the Active Directory user binding (from samAccountName to UPN) caused existing users to be removed from groups and new users to be added based on UPN when synchronizing Active Directory groups. This resulted in duplicate users and/or users not being able to sign into Tableau Server.
A new version, Tableau Server 9.1.5 (9100.16.0125.1553), is available from the Alternate Download Site.