We’ve hit an issue with azure session affinity using the ARRAffinity cookie. We have an AFD domain of say x.co.uk which routes 50/50 to 2 AS’s one in uk south and one in uk west.
The problem is the cookie domain returned to the client is for the AS domain like either uks.azurewebsite.net or ukw.azurewebsite.net and this is rejected by the client which only allows x.co.uk.
What’s the best practice to fix this? Without this cookie returned by the client on subsequent requests the session affinity is broken.