URL forwarding is now available under Settings. This resolves the issue we had with isites URLs. Excellent !
I just learned that isites feature development is suspended while openscholar is improved. This means another migration in the future for us ...
It turns out that after all IT is able to provide vanity URLs for isite home pages and also for certain sub-pages. This is a much better solution. However, isites only provides this service for widely communicated pages. On the other hand, a concise URL is a prerequisite for reaching a wide audience, so it becomes a bit of a chicken and egg problem. Actually, the point of most of web content is to provide public and easily accessible information.