Nick:
...
> Maybe kSuite (https://www.infomaniak.com/en/ksuite/myksuite) with email,
> shared documents, cloud storage, calendar and chat channels etc. is
> suitable for this. There is a free version and a choice of paid versions
> and is hosted in Switzerland.

I want it to run on my own site, so the above is less preferrable.

Regards,
/Karl Hammar