I have a question about companies many to many relation. We were looking at companies parent - child relations but unfortunately company can have only one parent. There is no way to add property that would allow creating many to many relations for companies from what I can see. Is there any way to model this in CRM? I was also looking at CMS, but it does not provide ability to link content co CRS.
You are correct that child companies can only be associated with one parent company at a time. The only workaround I can think of is to use multiple levels of parent-child relationships to create relationships between companies.