You can associate users, user groups, and roles to a server to control the operations that the users can perform on the server. For example, to create an administrator who can access everything in the Commvault environment, create a security association between the CommCell computer, the master role, and the users who are the administrators.
Before You Begin
If a system-created role does not meet your needs, create a role that contains the permissions that you want the users to have on the server.
Procedure
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From the navigation pane, go to Manage > Servers. Tip To go directly to the CommCell computer, go to Manage > CommCell. A page listing the servers appears. 
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Under Servers, click the server. The server details page appears. 
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Under Security, click Edit. The Security dialog box appears. 
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On the Associations tab, in the user box, type the user or user group name, and from the generated list, click the user or user group name. 
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In the Select a role box, select the role, and then click Add. For example, to assign all permissions to a user, select the master role. 
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Repeat the preceding steps for each user and user group and role that you want to include in the security association. 
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Click Save. 
Results
The users and user groups can perform actions on the server based on the permissions defined in the role.