what happens when you deactivate a user who owns some appian objects?

@ajays Added to Alok's explanation 'Some of the expressions / functions might stop working with a privilege exception', there are some more and they are infact much crucial as follows:
>> https://forum.appian.com/suite/help/7.9/User_Management.html#Deactivating_Users

>> Tasks assigned to a user remain assigned to that user even after the user is deactivated. If the user is reactivated, the user will continue to see the task. ('Best Practice' at https://forum.appian.com/suite/help/7.9/Assignment_Tab.html')

Hope it adds some more information to your question.

@ajays Added to Alok's explanation 'Some of the expressions / functions might stop working with a privilege exception', there are some more and they are infact much crucial as follows:
>> https://forum.appian.com/suite/help/7.9/User_Management.html#Deactivating_Users

>> Tasks assigned to a user remain assigned to that user even after the user is deactivated. If the user is reactivated, the user will continue to see the task. ('Best Practice' at https://forum.appian.com/suite/help/7.9/Assignment_Tab.html')

Hope it adds some more information to your question.