Forum Discussion
ERROR: "Bad Request - Request Too Long" When Signing In To Microsoft 365 Using Work Profiles
Been having the same issue for a few days now. Absolutely infuriating and completely breaking my workflow.
Tried installing Edge Beta, Dev and Canary - none of those seem to open.
Installed Chrome - seems to have the same problem - so likely requires a fix from Chromium project.
Hopefully it comes quickly.
joelkino I did eventually find the root cause and did eventually resolve this.
Root Cause: When Windows stores your credentials e.g. Edge Work Profiles, OneDrive, Windows sign-in etc., all these credentials are sent through to the website as a (layman's perspective) 'here are a few existing credentials I've got stored, can you use any of them to sign-in automatically?' suggestion to the website. These credentials (tokens?) all end up exceeding some limit on the size/length of a HTTP header field and you get the error.
Fix: My fix was probably a bit overkill because I deleted them all (I think I used Windows Credential Manager to do this, could be wrong). You can tell whether a credential is stored because in the Microsoft 365 login prompt pick-from-existing list it will say 'Connected to Windows', mine now just has three. Do check your OneDrive for Business accounts, I was connecting to 8 different tenants, with credentials stored for each, once I signed out and deleted the credentials, Edge Work profiles immediately started working again.Good luck!
