I find it hard to believe CORS is the root cause. It’s more likely that the server returns an error response and _that_ response doesn’t include the CORS headers.
You are probably right. However, if I remember correctly (it's been awhile), it was one of them that didn't return a CORS header, but a 200 status, but that led to a number of requests that failed. But regardless, as an SPA, the Teams application is not resilient to it.
bigpeopleareold|2 years ago