Outlook client connectivity is impacted due to internet icon in computer shows globe

In few of the user machines the internet icon turns globe intermittently. During this time outlook client does not connect and shows "Need password" but internet works fine through browser and outlook for web works as well.  The globe symbol will automatically disappear in few minutes and outlook will start working. 

Not much information from netsh trace capture. 

Any suggestions/fix. 

Tnx !