How to disable NotifierManager resource during maintenance window

Hello Guys,

I want to disable NotifierManager resource as i dont email alerts to be sent during planned maintenance window.

I tried following steps.

[root@abc ~]# hares -offline ntfr -sys abc
[root@abc ~]# hares -modify ntfr Enabled 0
VCS WARNING V-16-1-50037 Can not disable non-persistent resource which is not in a clean offline state
[root@abc ~]#

What are the correct steps to temporarily disable email alerts in VCS