Content Delivery presentation environment web application server support history

SDL Tridion Sites 9.1 Content Delivery has a number of changed web and application server prerequisites for its presentation environment, compared to SDL Web 8.5 or SDL Tridion Sites 9.

In the following table: N=not supported, Y=supported, D=Deprecated (support may be dropped in the following version release), Dr=Dropped (support is definitely dropped in the following version release), P=Probably dropped (support is probably dropped in the following version release):

Web application server8.599.1
Apache Tomcat 7.0Y (must be 7.0.47 or later)NN
Apache Tomcat 8.5YYY
Apache Tomcat 9.0NYY
IBM WebSphere 8.5.5YNN
IBM WebSphere 8.5.5.9NYN
IBM WebSphere 9.0Y (requires Liberty)YY
JBoss Enterprise Application Framework 7.0.0YNN
JBoss Enterprise Application Framework 7.1NYY
Microsoft IIS 7.5PNN
Microsoft IIS 8.5YYN
Microsoft IIS 10.0YYY
Oracle WebLogic Server 12c R1PDD
Oracle WebLogic Server 12c R2YYY