I'm probably extrapolating a lot from very little, but here's my take:

> It was legal day today at ente

I took this to mean that they regularly meet with their legal team, not for a specific purpose, but just to touch base and catch up on anything that may useful to have council's eyes review (read: informal meeting with legal team). Estoppel could have come up any number of ways, talking about contracts and their enforcement, someone asked a question that naturally veered into that territory, etc.