This page lists all of the communities of which you are a member, making it simple to unsubscribe from communities you no longer need. However, your administrator might have made your membership in some communities mandatory (displays Mandatory to the right of the community name). You cannot unsubscribe from mandatory communities.
To remove yourself from a community:
In the My Communities menu, click Unsubscribe Communities.
To select all non-mandatory communities, select the box next to My Communities; to select an individual community, select the box next to the community.
Click 
Unsubscribe.
To save your settings, click Finish. To revert to your previous settings, click Cancel.
The communities to which you unsubscribed no longer appear in your My Communities menu.
To display the help associated
with this page:
In the My Communities menu, click
Unsubscribe Communities.