What will happen to the objects that are last modified by a user whose account is going to be deactivated soon?What are the precautionary steps that need to be taken while deactivating a user in appian? What about process models which are configured to run as whoever designed the process model??
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For Dev designer users, the approach I've found best is to change their username slightly and add them to the "Service Accounts" group. This prevents them from logging in, and prevents them from auto-expiring (hence any impacts on running instances). Once you're sure there are no more running instances under that account's authority, you can deactivate them more permanently.