Where to search for differences in the portal page?

[Karin Kriebisch]

Hello,

We have a couple of projects in JSM with each having a portal site where only the invited users of a specific customer have access to and execpt for a short welcome-text  should contain only the link to open a request.
But, one project differs and is shows on its portal page links to resources of other customers, which is unacceptable. Why and how this happed I don't know. 

It seems that a linkage to our knowledgebase has happen because the links under the name of "Learn more about" resembles our knowledgebase categories. 

How can I efficiently and quickly check the differences of the portal pages and of course how can I remedy the situation? 

Every bit of help is welcome!

Regards

K. Kriebisch