Extending EDTs

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I'm working toward an F&O cert and there's this study page on EDTs:

https://learn.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/extensibility/modify-edt

Elsewhere there is a sample question that goes like this:

It appears that D is the correct answer, which I agree with. But I don't understand why B is not an equally correct answer. According to the official learn.microsoft.com page linked above, DERIVED EDTs can in fact be created, and then modified as needed. Here is the exact text from that page:

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Note

Instead of extending an existing EDT, you can create a new one, deriving it from the existing EDT. This allows you to edit more properties than you could edit using the extension approach. This means that you would need to modify the fields using this EDT to use your new EDT.

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To me, both B and D are correct. So...why only D. Why is B incorrect?

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Navneeth Nagrajan 1,439 Super User 2024 Season 2 on at

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Extending EDTs

Hi,

D is the correct answer as it is recommended to create extensions to existing base components in D365FO. The question states modify properties of an EDT using an extension hence D is the right answer.
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Layan Jwei 7,349 Super User 2024 Season 2 on at

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Extending EDTs

Hi Community member,

The question says "modify edt by using an extension"

So logically B is not correct because it creates a new one instead of modifying the existing one.

And here's a link for conditions to modify string size of edt

https://learn.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/extensibility/modify-edt

Thanks,

Layan Jweihan

Please mark this answer as "Verified" if it solved your issue. In order to help others who will face a similar issue in the future
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Martin Dráb 230,445 Most Valuable Professional on at

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Extending EDTs

B doesn't fulfill the requirement. The goal is to "modify properties of the EDTs". B creates a new EDT; it doesn't change the existing EDTs.
Community member 20 on at

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Extending EDTs

Mohamed, that doesn't answer the question. Over in ExamTopics, "C. Create a derived EDT for AccountId and decrease the field size" is the opposite of the item from my post (B) which talks about INCREASING field size, not decreasing.

I still see no evidence why B (above) is not an equally correct answer.
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Mohamed Amine Mahmoudi 9,818 Super User 2024 Season 2 on at

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Extending EDTs

Hi,

the coorect answer is (D) Create an extension for AccountBase and increase the field size.

please see this : https://www.examtopics.com/discussions/microsoft/view/47719-exam-mb-500-topic-3-question-15-discussion/

Best regards,

Mohamed Amine MAHMOUDI