@uniinnsbruck Just BeAware that ActivityPub isn't privacy focused for stuff that can be seen via profile pages. If a user's posts are set to "public", then there's no sense of privacy whatsoever, it federates far and wide.
I know this is most likely not an issue for an instance for University employees, but it probably should be known. At least private things like e-mail and IP address don't federate though and there's no tracking cookies or anyone to sell your "off-site data" to!