Submitted ideas will be evaluated by our product teams for upcoming releases and will be responded to so you know where things stand. For product support, please use the community forums or contact TAC.
NOTE: All Cisco employees & Channel Partners must enter Ideas through this Ideas Portal.
An advance messaging license is required to moderate a space and to add Space announcements.
However we do not have any documentation saying so.
The following documentations only says talks about roles of Moderator but doesn't talk about its requirements:
https://help.webex.com/en-us/article/zuwad5/Webex-App-%7C-Roles-on-Teams-and-Spaces
https://help.webex.com/en-us/article/xuwad5/Webex-App-%7C-Make-someone-a-team-moderator