Click on the Teaching and Research tab and find Euclid.
Click on the Student Adviser tab.
Click on the Group Messages/Meetings tab:

This will display all meetings & messages added by you to the group of selected students:

As the Student Adviser you will be able to see all notes/comments made by yourself against the group meeting, however, to view student comments/notes you will need to view their Notes/Meetings individually.
Identify the message/meeting you with to add a comment to.

Click on the Comment link within the message.
This will display the Add Group Comment screen.
Key in your comment within the field provided.
Select the appropriate comment category & upload any documents if required.
Click on the Save comment button:

This action will return you to the Group Messages/Meetings tab with the group comment displayed:

Adding a comment will result in an email being sent to each student included within the initial note or meeting commented upon, notifying them of the update. This can then viewed by them via the MyEd Student Support Team tool.
As the Student Adviser you will be able to see all notes/comments made by yourself against the group meeting, however, to view student comments/notes you will need to view their Notes/Meetings individually.
The group of students invited to the meeting will see all of your notes/comments, but none of the other students notes/comments.