Every content item in this list is tagged with all the required labels:

• acknowledge
• administration
• answers
• collaboration
• custom-mail-flow-rule
• email-access
• groups
• meetings
• migrated-groups
• office365
• privately
• scheduling-tool

To add a label to the list of required labels, choose '+ labelname' from Related Labels.
To remove a label from the required labels, choose '- labelname' from above.