Disable input text suggestions in Edge?

If I understand correctly, you are having an issue with the autocomplete feature. Simple add "autocomplete='off'" to your input and that should disable the feature.

<input type="text" autocomplete="off"/>

Unfortunately, none of the above suggestions worked for me in latest Edge. However, this solution does:

<input type="text" autocomplete="off" list="autocompleteOff" 
    id="fieldId" name="fieldname" placeholder="Placeholder here" />

This forces Edge to find a data lookup list called autocompleteOff which doesn't exist. Works a treat for me.

Added advantage is that it's pure HTML, no CSS or JS required.

2021 update:

Another solution which works very well for me is to add the readonly attribute to the field and then remove the tag using JQuery after a short delay of a few ms. The readonly attributes causes Edge (and others) to ignore the field.