ArcGIS Pro 2.6 Blank Sign In

Question

We are running into an issue where some users are unable to log into their Enterprise ArcGIS Online accounts within ArcGIS Pro. They can access the login screen but a blank  screen appears (and stays) after clicking the Organization button. This only occurs with Enterprise accounts. I have been able to log in using a built-in account

Several users are experiencing this issue over VPN, but recently the issue has been reported by users whose machines are hardwired to the network. I have tried resetting Internet Explorer and adding every variation of arcgis.com and our organization's ArcGIS Online URL to the list of trusted sites to no avail. Any help is appreciated.

Thank you,

Mary Grace

Anonymous User · Answer

I ran Pro with the "/enablediagnostics" command line switch and got the following from the log file:

"BSSO Telemetry: {"result":"Error","error":"NoExtension","type":"ChromeSsoTelemetry","data":{},"traces":["BrowserSSO Initialized","Creating ChromeBrowserCore provider","Sending message for method CreateProviderAsync","Received message for method CreateProviderAsync","Error: ChromeBrowserCore error NoExtension: Extension is not installed."]}", source: https://login.microsoftonline.com/xyz/saml2?SAMLRequest=xyz&RelayState=xyz (73)

Seems to be some internal config settings preventing it from working. https://login.microsoftonline.com is a trusted site.

This post suggests it's due to the blocking of third party cookies but that too I've changed.

Anonymous User · Answer

I'm wondering if ArcGIS Pro no longer works with IE11 since support for ArcGIS Online on IE11 has been deprecated. I hadn't thought to check on Edge to see if AGO was a trusted site, but will after the holidays.

Anonymous User · Answer

Unfortunately, I don't think this is the case for us. We've got no issues with any other Azure AD logins and it's working with ArcGIS Pro 2.3 in the same environment. It was also working fine in Pro 2.4 & 2.5, before I upgraded to Pro 2.6.