1

After logging into the system (link to muni), go to the organization (e.g. Masaryk University).
This is possible through the Access management item, where you find and select the organization.

...

2

Select Groups.

...

3

click on the group to which you want to add a new member.

...

4

Select members.

...

5

Select Add

...

6

Search for the user you want to add via the Search user by name, login or email field.
Then select it and choose Add.

...

7

If you want to check the addition of a user, just search for it in the current group via the Search user by name, login or email field.