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how to use a extended table in a form datasource

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Posted on by AS-30042044-0

i extended a table and now i want to use this table in my new form but the extended table is not set as form DataSource?

your answers will be appreciated.

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Martin Dráb 238,740 Most Valuable Professional on at

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You're asking in D365 general forum, but your question clearly is about a particular product and not about D365 in general (regardless of the product). Isn't it F&O?

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AS-30042044-0 60 on at

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yes it is of f&o

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Layan Jwei 8,165 Super User 2026 Season 1 on at

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Hi Community member,

What do you mean is not set as form datasource, what error are u getting if you type the tableName in the properties and save?

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Anthony Blake 3,061 Super User 2026 Season 1 on at

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Set the original table (the table you extended) as your datasource. You will be able to see the new fields that are in your extension.

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AS-30042044-0 60 on at

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i created a relation in table and i am using it to new form and than when i drag and drop the extended table it is not set as data source

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Layan Jwei 8,165 Super User 2026 Season 1 on at

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Hi Community member,

I think it should work. For example try and drag and drop DirPerson, does it work? (DirPerson extends DirPartyTable)

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Dineshram R 4 on at

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Hi,

I have replicated the same scenario with adding two fields in the existing table and added the table in custom form it was working fine. don't try to drag and drop your table in the form DataSource instead create a new data source and add the existing table in the property level for your reference I'm attaching the images below. If you face any issue, try to put full synchronization.

Regards,

Dinesh

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Waed Ayyad 9,061 Super User 2026 Season 1 on at

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Hi Dinesh,

From the images that you sent; you mean you make extension of Sales Table and added new fields. If you see now your Datasource has the new fields? so what is your problem?

If you are talking about, make your new custom table extends Sales Table, then you should create new table add the new fields (Company and Mobile number) and set the property Extends in your new table to SalesTable.

Thanks,

Waed Ayyad

If this helped, please mark it as "Verified" for others facing the same issue

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