About: 

Why can't I run a meeting longer than 40 minutes?

Solution: 

This may occur probably because you have two Zoom accounts that need to be merged

If you have had a previous Basic or Licensed Zoom account with your McMaster email address, you can merge the two accounts into one account under the McMaster instance.

To merge the accounts, the first time you log into https://mcmaster.zoom.us, you will be presented with an option to merge the two accounts.

Select “Yes, I want to merge the accounts” and all data from your previous account will be merged into your McMaster account and you will have one account.