CEF-based sign-in does not work with Azure AD conditional access

Open the Run command window by pressing the Windows + R keys. Enter regedit in the Open field, and then select OK.

In the Registry Editor, go to the following location:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Adobe Acrobat\DC\FeatureLockDown

If FeatureLockDown is not already present there, create it as a new key.

Inside FeatureLockDown, create a new DWORD and rename it as iAcroLoginType.

Assign the value 5 to the key iAcroLoginType.

Close the Registry Editor, and launch Acrobat.

Open the Run command window by pressing the Windows + R keys. Enter regedit in the Open field, and then select OK.

In the Registry Editor, go to the following location:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Adobe Acrobat\DC\FeatureLockDown

If FeatureLockDown isn't already present, create the key.

Inside FeatureLockDown, create a new DWORD and rename it to iNGLCEFWorkflowEnabled.

Assign the value 0 to the key iNGLCEFWorkflowEnabled.

Close the registry editor, and launch Acrobat.

Quit all the Adobe applications if any running on your computer.

Navigate to the folder C:\ProgramData\Adobe\OperatingConfigs. 

If the OperatingConfigs isn't already present, create a new folder with the same name.

In the OperatingConfigs folder, create an empty file with the name EnableIEBrowserWF.CONFIG.

Exit the folder and launch Acrobat.