SystemUtil.Run "iexplore.exe" , uac_url
With Browser("XYZ")
    With .Page("XYZ")
        .WebEdit("username").Set uac_username
        .WebEdit("password").SetSecure uac_pass
        .WebButton("Sign In").Click
    End With
    .OpenNewTab 'This not working
End With

'Open portal URL in second tab of IE
With Browser("CreationTime:=1")
    .Sync
    .Navigate portal_url
End With