Issue Summary

This is reproducible on Data Center: yes

Cloud doesn't have a confluence-administrator by default, but instead administrators.

When you import a site from Cloud, administrators don't inherit all the permissions from the confluence-administrators group. Even if you create that group in Confluence later, since it's a special group, you can't assign all the permissions, so you will end up with a confluence site that doesn't have a full site administrator, as any other group you add, even with all permissions, will lack some features that only confluence-administrators provide.

• To extract the attachments

  for i in $(ls restorecloud.?); do cat $i >> restorecloud.zip; done
  unzip restorecloud.zip

  Steps to Reproduce

1. Export a site from Cloud
2. Import the site into Confluence DC
3. Use recovery admin to restore access to the site
4. Check the confluence-administrator group
5. Create the group if it didn't exist in your Cloud site
6. Check the Global permissions and try to add all permissions to it

Expected Results

 The confluence-administrator group should always exist or inherit all needed permissions when creating it.

Actual Results

You're not able to give any permissions to the confluence-administrators group

Workaround

You can manipulate the permissions in the DB