Hey there, Joe Jorgensen
If you are an administrator and are using a service that has been effected by changes or an outage, Microsoft will send you an email about the affected service in advance so you are aware. You can sign into the Azure portal to view service health here: https://portal.azure.com/#view/Microsoft_Azure_Health/AzureHealthBrowseBlade/~/plannedMaintenance
At the moment, when I look on the Azure service health, there are planned maintenance scheduled for the Central Canada regions.
Normally, with these it is making you aware of services that are going to be effected and why. You will be able to update your systems/apps/services or (in the case of planned maintenance) try and mitigate the risk this will impact your customers/users or let your customers/users know that their service will be impacted and why.
For any emails you get that you are unsure of. It is always best to navigate to the official sites by opening a web browser and entering the address. Please do not click on any links in the email sent, if you are unsure.
You can sign into the Microsoft service health from your Microsoft 365 admin dashboard here too: https://admin.cloud.microsoft/?#/servicehealth
Hope this information helps,
Nathan