For a definitive answer look at "global permissions" and note the groups that have "can use" or "administrate" access (Defaults are "confluence users" and "confluence admins", but they can be changed)
Then go to Users -> Groups and have a look through the groups. You are likely to find more than 87 people listed in total, and some duplicates
"Confluence admins" for example, also count towards your licence, but are usually in "Confluence users" as well. An account like that still only consumes one "seat".
The reason you may have more than 87 across the groups (after deduplication) is people who have left - their accounts should be deactivated, at which time, despite still being in groups, they cannot log in, and hence do not count as licence users.
Thanks everyone for answering last week’s question. The winner of the random drawing from those who commented is: @LarryBrock I’ll contact you separately with your prize details. This wee...
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