How to control the extendibility of tables?

[Abhishek_Thakur]

Do you know what controls the extendibility of any table in ServiceNow?"
Today I was implementing the application, I landed up in the situation where I need to extend with the "sys_user" table but it was not reflecting in the reference field. So, I checked the properties of sys_user table and I found that in control section of table you need to enable the "Extensible" checkbox to true to make your table extendible with another table.

[Dr Atul G- LNG · Accepted solution]

Hi @Abhishek_Thakur 

You can go in tables in Navigation and on list view you can see which table has extensible

[Abhishek_Thakur]

Thanks @Dr Atul G- LNG for your solution.