Hi, I am migrating an FME Flow Azure AD web service from FME Form 2025.0.1 to 2026.3.0.0 (Build 26589). The upgrade to FME 2026 introduced the redirect strategy, due to removal of embedded browser, which was working previously, so I know the details I’ve used should work.
Error:

I’m using no secret. I’ve tested using both Loopback Interface Redirect and Proxy Redirect, same result on both. Everything has been set up following instructions outlined in:
https://support.safe.com/hc/en-us/articles/39450156608781-External-Browser-Authentication-in-FME-Form
I’ve set up everything as instructed in azure too.
I’m stumped by this issue. Not sure how to even begin to debug it. FME form has no logs for me to assess. Azure has only basic logs which offer no answers.|
Can anyone give me some ideas on what I can try and check to resolve this? Is using tinker the only way forward?
Happy to share the full web service config if useful.
Thanks

