On the forum screen of Dynamics 365 Portal, an error which means "a required field is not entered" is display when you click the [Send (post)] button immediately after entering the value in the content field. It seems that it takes time to read the value entered in the content field of the forum, especially at Microsoft Edge it takes longer to reflect the value (about 5-6 seconds) Because of that influence, if clicking the [Send (post)] button immediately after entering the value in the field, because the value input has not been completed, a warning message meaning "It can not be saved because the value is not in the field" will be displayed. (After waiting a few seconds, the value will be reflected in the field, so it seems to be the default behavior.) In order not to confuse users, it is better to change not pressing the [Send (post)] button or to implement a customization function that makes it impossible to press the button until the value is reflected in the content field.