Account Limit

@Markus Rathgeb -

The Education plan allows you to have 100 members in a team with one team admin as per this Help Center article (https://help.miro.com/hc/en-us/articles/360017730473-Education-Plan). 

In case you are nowhere near that limit, you can submit a Miro support request here: Submit a request – Miro Support & Help Center

Kiron

@Markus Rathgeb - while we wait for Miro support, we could try to better understand what is going on.

There are a few versions of the Education Plan as noted on this page:

To find out which plan you have and how many seats/licenses you have, and how many are used, look at your Team profile settings page:

… which will take you here:

Visitors access vs inviting students to the team

The Education Plan does not allow adding students to the board as editors – this feature would be called Guests and Guest editors is not included with the Education Plan. Instead, when you type in the students email addresses at the top of a board’s Share settings window, you are also adding them to the team, where they can create boards, projects, etc., and potentially see every other board/project in your team.

If the students on need to work on boards, you can instead use the Visitors features, aka, Anyone with the link → Can edit. You can even password protect the board(s) if you wish.