Navigate to Confluence administration > Microblog > Topics.
Alternatively, click on the settings button in your Linchpin header, then click on the Microblog link. Then choose the Topics tab.
All topics belong to a Confluence space. This is important. Attachments and permissions won't work properly otherwise.
Input the name of the space to which the topic should belong, then enter the topic name. To apply your changes, click on the Save button.
You need to create at least one topic to be able to use the microblog.
With version 6.0.3 the topic name may not contain any type of tags (e.g. <p>Topic</p>).
You can change the name of a topic by clicking the pen icon in the "Actions" column.
You are able to move a topic and all its microposts to another space.
Depending on the number of microposts within the topic, this operation may take some time.
There are two slightly different ways to remove a topic.
If the target topic is in a different space with different permissions than the old one, some users might not be able to edit or write new microposts anymore.
Link to this page: https://seibert.biz/microblogtopics