On the Coveo server, access the Administration Tool (see Opening the Administration Tool).

In the Administration Tool, select Index > Sources and Collections.

In the Sources and Collections page:

1. In the Collections section, expand the drop-down list of the collection for which you want to set the permissions, and then select Edit Permissions.

2. In the right panel, under Permissions:

   • To grant access to the collection:

     1. In the Permissions section, select the Specific users radio button.

     2. In the Allowed Users section, click Add.

     3. In the Add identity dialog box that appears:

        1. In the first drop-down list, select the security provider in which the user or group is defined.

        2. In the Type drop-down list, select between three identity types (User, Group, or Virtual Group).

        3. In the Name box, enter the account name of the user or group.

        4. Click Add.

   • To revoke access to the collection for an account that is listed in the Allowed Users box, click the X icon next to the account.

     Tip: When you want to revoke the access to more than more account, select the accounts check box, and then click Remove.

   • To revoke access to the collection for an account that is not listed in the Allowed Users box, in the Denied Users section:

     1. In the Permissions section, select the Specific users radio button.

     2. In the Denied Users section, click Add.

     3. In the Add identity dialog box that appears:

        1. In the first drop-down list, select the security provider in which the user or group is defined.

        2. In the Type drop-down list, select between three identity types (User, Group, or Virtual Group).

        3. In the Name box, enter the account name of the user or group.

        4. Click Add.

Note: The permissions are immediately changed in the index and are immediately applied for new incoming queries.