As shared in the Azure Community Update, the Azure community is evolving 
To improve your Community experience and facilitate finding the best place to start your conversations we`re implementing a few updates on our community, such as rearranging the Spaces in the Azure community (if in doubt of where to post, the Azure Space is always the best place to start) and creating new communities, such as System Center, Azure Active Directory, and Enterprise Mobility + Security which you`re more than welcome to Join now!