In AX2012, we had the possibility to have a multiline text field (Notes) attribute by activating a checkbox. But we do not have an equivalent functionality in D365.

Due to this issue customers are not able to have a multiline attribute (to write a detailed notes) and customer upgraded from Ax2012R3 to D365FO is facing issue.

Repro:

In Dynamics AX2012, we have the “Notes field” checkbox on the modeling variable (attribute type):

The checkbox allow us when the modeling variable is used in the product configurator :

we could add Notes text (multiline text):