A proxy user is created for each community to manage that community's shared calendar. Follow the instructions in this section to avoid populating the manually created Portal Server users' organization.
Create a new parallel organization with a unique domain name to the organization containing the community users via Delegated Administrator.
For example, create an organization called proxyusers.com.
Set the DA_DEFAULT_DOMAIN to the proxy user's newly created organization domain name.
For example, set the DA_DEFAULT_DOMAIN to proxyusers.com. If the portlets have already been deployed, update the relevant SSO adapters via the Portal Server administration console and set the DA_DEFAULT_DOMAIN to the proxy users organization domain name.