At the end of last year we released version 9 of our IBM Digital Experience, IBM WebSphere Portal, IBM Web Content Manager software. Among other features version 9 supports IBM WebSphere Application Server version 9 and integration with IBM Watson Content Hub. If you are on version 8.5 it is a very simple procedure to move to version 9 and you can even stay on WebSphere Application Server 8.5 if required.
If you are currently considering migration from a previous release like version 7 or 8.0 we recommend to consider version 9 as target to start off with the latest supported version. Note that when using the automated migration and not manual migration one would migrate to version 8.5 and then apply version 9 via the Installation Manager.
Below I have collected a set of links to get you started with version 9:
InfoCenter (installation and configuration of v9): http://www.ibm.com/support/knowledgecenter/en/SSHRKX_9.0.0
InfoCenter for regular operation and configuration leverages the v8.5 InfoCenter: http://www.ibm.com/support/knowledgecenter/SSHRKX_8.5.0/welcome/wp_welcome.html
Software Support Lifecycle for Portal: http://www-01.ibm.com/software/support/lifecycleapp/PLCDetail.wss?psynkey=I682946E87648C32&synkey=B754819J28579H68&from=spf
System requirements: http://www-01.ibm.com/support/docview.wss?rs=1070&uid=swg27007791
Tuning Guide (for now use Portal 8.5 tuning guide until updated): https://www-10.lotus.com/ldd/portalwiki.nsf/dx/IBM_WebSphere_Portal_V_8.5_Performance_Tuning_Guide
Recommended fixes (link will be used for 8.5 and 9.0): http://www-01.ibm.com/support/docview.wss?uid=swg24037802
Adding Portal 9 to a 8.5 Portal installation : https://www.ibm.com/developerworks/community/blogs/portalops/entry/Adding_Portal_9_to_a_8_5_Portal_installation?lang=en
Administering IBM WebSphere Portal 9.0: A comprehensive workshop: https://developer.ibm.com/digexp/docs/docs/customization-administration/administering-ibm-websphere-portal-9-0-a-comprehensive-workshop/