I have just had a problem where a user of one of my spaces was unable to edit pages in that space. I was confused as the default permissions should have allowed him to.
I naively assumed that if I went to the users profile page, it would tell me there which groups he was a member of, but it seems that this is not the case.
I tried to find out from the documentation how I could find which groups he was in, but failed.
I ended up going to the confluence admin groups page and manually checking every group listed in the space admin permissions page to find if he was in any of the groups explicitly granted permissions. This was very tedious since some groups had hundreds of users and dozens of pages of names.
In the end I found that the user wasn't a member of the confluence-users group, as they should have been, but it was a long and tedious process to find this out.
So, if this happens again is there an easy way to find out what groups a user is in?