Was a conflict with another SSO.
Just wondering - was your error something about "Another user is already logged into the application on this client"? ONE of my users is getting this error and I am tearing out my hair trying to figure out her issue. It looks like she is logged onto Edge with her company email which is what she would log on to OneStream with - so I am stumped.
I would suggest that your user to sign out of Edge and then try logging into OS. When they do that they should get a pop-up to enter User ID & Pwd, and this should help.
