"Alert me" Missing in SharePoint 2010?

In an odd case, received complaints from users "SharePoint alert me missing!". Usually "Alert me" link will be there under documents tab of the SharePoint 2010 Ribbon. End-Users were unable to get "Alert me" link. When I checked, Yes, alert me button missing in SharePoint 2010 site!!

and some more complaints for getting error messages when trying to setup alerts.
"Alerts have been turned off for this virtual server. For assistance, contact your server administrator."

Fix: 
Check whether the Outgoing E-Mail settings are configured in Central Admin.  Go to:Central Administration >> System Settings >>  Outgoing E-Mail Settings >> specify the outbound SMTP server & E-Mail settings.

If already enabled, Then alerts might be disabled. Enable Alert by: 
stsadm -o setproperty -pn alerts-enabled -pv true -url "http://your-web-app-url.com" 

That would fix the issue: alert me is missing in SharePoint 2010! Got the alert me link and we are back to the business!