When signing in to the vIDM appliance, the Windows Security pop up appears with the following text:
Sign in to access this siteAuthorization required by
As per the screenshot below:
VMware Identity Manager 3.3.7
This might be cause after disabling the RC4 encryption.
Identity & Access Management > Policies Web Browser policy "then the user may authenticate using" to Password instead of Kerberos.4. check time drift between the VIDM and IDP. (login to vIDM configurator page and check the NTP)
For more information about the RC4 Encryption, see the VMware Identity Manager 3.3.7 using RC4 encryption.