Portal current limitations
Here are some of the new portal limitations that you should know when customizing it. They might change in the future.
There is no form defined in the default Portal to display an
organization, as a result all organization fields
If you want to restrict the organization fields visible by Portal users, then you will have to define a form within an iTop extension, .
When searching an object from an attribute of type ExternalKey or LinkedSet, the filter doesn't work on attributes of type Date / DateTime / Duration / Deadline / HTML.
Below is a screenshot of the concerned search form :