I'm creating a new workflow, which connects a user to a AD group. The client wants an "EndDate" field, that disconnects the user from the group.

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I think it could be simple with a NullDriver. But I have to extend the schema to save the expiration date, creating a new attribute for each group in an auxiliary user class. This is quite annoying because the client has over 1000 groups
Is it possible to extend the schema and create a new attribute when the AD driver creates the group in the eDir?

Or there is another way?