Issue Description
Recently in our SharePoint 2013 farm, I had noticed that
the "Alert Me" button was missing from library tab in
SharePoint
Ribbon.
Resolution
1. Please try this article first - “Alert
me” option missing in SharePoint
2. If this solution dint help, try using the below STSADM or
PowerShell command to enable the alerts:
STSADM:
stsadm -o setproperty -pn alerts-enabled -pv
true -url http://webappURL
PowerShell
$webapp=Get-SPWebApplication
"http://webappURL"
$webapp.AlertsEnabled = $true
$webapp.Update()