For Full Administrator Mode, the following restrictions are described in Domino document which shows that is restricted to use Domino Administrator Client only:
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Restricting administrator access
https://help.hcl-software.com/domino/14.0.0/admin/conf_restrictingadministratoraccess_t.html
related descriptions:
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In order to work in full access administrator mode, an administrator must:
Be using the Administrator Client.
Be listed in the Full Access Administrators field in the Administrators section of the Security tab in the Server document. By default, this field is empty.
Enable Full Access Administration mode in the Administrator client by selecting Administration > Full Access Administration. If this mode is not enabled, then users will not have full administrator access to the server, even if they are listed as a full access administrator in the Server document. They will instead be granted Administrator rights.
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Please consider to implement and formally support Full Administrator Mode (function) for C API Programs in future release, also described this in Domino document formally.
Thanks!
Customer just wants to use C API Program to access all databases and dump documents in files no matter which kind of ACLs are set. Thanks!
(I know that for security consideration, the above is not good).