How can I create a group? I am confluence admin

[Simo Martinovic]

This question is in reference to Atlassian Documentation: Adding or Removing Users in Groups

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[Nic Brough -Adaptavist-]

Go to user management -> groups and click "add group".

This only applies if your user directories are read/write - if you've got an external user system and it's read only, you'll need to be admin on that instead of Confluence.