Best way to create a Sign-Up sheet

Robert Woods or anyone else:

Appreciate this question and want to take it a level up:

I have a need to restrict registration for training sessions to keep groups manageable, and also streamline the process of sending out calendar invites to those registered. 

Has anyone found a solution within the Microsoft ecosystem to:

- create and distribute sign-ups with a quota

- automatically distribute Outlook Calendar invites with Teams meeting information upon successful registration

- manage cancellations/reschedules automatically.

The simplest out of the box answer that I've used for years is this - 

• Create a list with all your fields. I use something like "Preferred name" for the Title field and a people field to capture the corporate name and contact info. If you're working with external people, skip the people field and add an email field. 
• Create 30 new items. I fill in the Title field with something like "Your preferred name here".
• Put it on a page displaying the 30 line items.
• Give the people "edit-no contribute-no delete" privileges. This will allow them to edit existing items, but not add new items or delete anything.
• Send out the link.

When the 30 line items are full, you're done. No code, no Flow, no PowerApps so it has a consistent UI on every platform and works on any version of SP. Even better, you can use this same list over and over by filtering the next 30 items. Eventually you have a full database of people who have attended all your functions.

Hi Robert - this is such a simple, and common request and I don't know of any out of the box tool that will do this in O365. Did you see this conversation? Midway down is a Flow that you can add to a Form to limit responses: https://techcommunity.microsoft.com/t5/Microsoft-Forms/Limit-number-of-responses-on-a-form/td-p/78704. Will be very curious to see if others jump on this thread with better ideas.