Forum Discussion
Bad Request Request too long HTTP Error 400. The size of the request headers is too long.
Help me please, I have logged myself out of my admin, microsoft exchange, onedrive and outlook on my microsoft 365 F3 profile (owa?). I get the message Bad Request Request too long HTTP Error 400. Th...
I have seen this error myself. You may have a filter set that has too many variables selected. For example, if you are viewing the "Incidents" page in Microsoft 365 Defender, click on the "filters" and at the bottom click on "clear filters". This may resolve the issue you are seeing.