I have an Azorious Eldritch Knight character that I am leveling from 3 to 4. I would like to replace False Life with Ensnaring Strike. However, I can't find the spell on the character page when I try and edit it. What am I doing wrong?

I’m not sure what Azorious is, but Eldritch Knights only have access to spells from the Wizard Spell list, Ensnaring Strike is a Ranger spell and so not available for Eldritch Knights to learn.

The Azorious Senate is a guild found in Guild Masters Guide to Ravnica which allows access to the spell. You have to take their background in order to have access to the expanded spell list. I figured it out. Thanks for the assist. 

Gotcha. Don’t have that book myself. Glad it worked out.