Assign ID to another column within same item (without Flow)

[Christoph1982]

Hi all, 

following requirement:

I want to copy the value of the ID field in a document library to another column (e.g DocID) within the same document/item. 
Is it possible to use lookup column for this? I´ve tried it but I have to assign the ID then manualy. 

I want to avoid to use a flow and would prefer an out of the box approach. 

[#2]

@Christoph1982 

There is no SharePoint out of the box way to store/save the value of ID in another column. Possible workarounds:

To store the value in another column:

1. Using Power Automate flow/workflow - Recommended
2. Calculated column with formula =[ID] - Not recommended (Works inconsistently)

To show the value in another column in document library/list view:

In SharePoint online modern experience, you can use JSON column formatting to show the value of ID column in another column in library/list view. Use below JSON for this:

{
   "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
   "elmType": "div",
   "txtContent": "[$ID]"
}

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