Some common management tasks for EA (to be performed by the EA UML repository manager, which could be the Technical Manager of your project) include:
Activate Security - Turn on the option that allows you to define who alters what part of the model and who does not (lock, unlock):
http://www.sparxsystems.com/enterprise_architect_user_guide/8.0/projects_and_teams/usersecurity.html
Managing Users - Create profiles, users belonging to profiles and defining permissions for those:
http://www.sparxsystems.com/enterprise_architect_user_guide/8.0/projects_and_teams/managingusers.html
Import Users from Active Directory - Integrating existing (e.g. domain) users into EA
http://www.sparxsystems.com/enterprise_architect_user_guide/8.0/projects_and_teams/import_user_ids_from_active_di.html
Initial EA Scripts - The DB schema that has to be loaded into the SQL DB initially:
http://silvaonsoftware.blogspot.pt/2016/10/ea-initial-scripts.html
(@2017-06-23: Minor rephrases)
