Add an incremental, unique ID

[JoeBorgione]

This is a topic that's been around for as long as I can remember.  The attribute assistant provided a couple methods to do this: autonumber, generate id, and there us a tool called Add Incrementing ID field but it is limited to database tables, not GEOdatabase tables; if an object id is present, the tool won't work.

Is there a method or tool available in ArcGIS Pro 2.4.3 that will autoincrement a field in an enterprise geodatabase table and/or feature class?

[GretaParis]

The errors I am receiving: 001487 & 001369

[kkopanias]

I am using the following exression in the attribute rule and in Pro it works just fine:

'acethn'+$feature.OBJECTID

Nevertheless in a Web App in Enterprise, I get the following result: e.g. acethn-1

Instead of the $feature.OBJECTID I get the value -1.