Large meeting we are not sure that the same session link will apply the 1000 members limit once we give the access the link with 300 members

I have a question regarding to the limit for large meetings … I am thinking of buying 1 license for all customers to share if any has a large meeting up to 1000…can we use the same zoom link that has been already scheduled by the host with limit 300 members to join after we taken this large meeting Enterprise+ plan for 1000 members? Large meeting we are not sure that the same session link will apply the 1000 members limit once we give the access to all the users…please let me know

Thank you,
careerquo.