Add Mailbox permission alert

Hello,

Is this a normal alert?

You're getting this message because there's activity in your Office 365 organization that matches the alert 'Mailbox Access'.Activity: Add-MailboxPermission User: NT AUTHORITY\SYSTEM (Microsoft.Exchange.ServiceHost)Item: EURPR08A006.PROD.OUTLOOK.COM/Microsoft Exchange Hosted Organizations///mydomain.onmicrosoft.com/DiscoverySearchMailbox{D919BA05-46A6-415f-80AD-7E09334BB852}Time of activity (UTC): 12/27/2019 4:11:24 PM

What's Next?

1. Search the audit log for this user
2. Search the audit log for this item
3. Search the audit log for this activity
4. Search the audit log for other activities that would trigger this alert

Regards