NOT KNOWN DETAILS ABOUT B2B OPERATIONS

I've 2 O365 tenants and want to easily grant people from the corporate tenant above to your partner tenant for SharePoint On-line. The B2B feels like It might be the easiest, but will it guidance Sharepoint On the web. The only illustration I see in MS docs is for any Groups Channel.We also have 1 list of people in Yet another tenant which have tro