Restrict messaging alerts to errors only during Azure Update Management automation activities

[dwalker3rd]

There's too much unnecessary messaging occurring during Azure Update Management activities. Of particular concern are SMS messages b/c (1) SMS messages has a per unit cost unlike other messaging providers, and (2) SMS messages tend to bypass DND settings on mobile devices and, thus, unnecessarily alert staff during non-business hours.

Potential solutions:

• Suppress all messaging during Azure Update Management activities except for the most critical notifications (such as 'Intervention')
• Disable specific messaging providers (SMS) and allow others (SMTP, MicrosoftTeams)

Note that there is a global setting for platform message types that should always be sent. However, the platform message types may not be flexible/granular enough and may need to be reworked to support this.

[dwalker3rd]

for now, this has been resolved by disabling messaging each time azure update managment calls azureupdatemgmt.ps1. that gives a suppression window of 90 mins before messaging is automatically reenabled.