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

• collaboration
• controlled-document
• dev
• gt
• konzepte
• office365
• sub
• ta3-re1
• thread
• videokonferenz
• viren
• ws

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.