TFS Back-up Notifications Our company uses TFS 2018. We have an annoying issue when there is TFS back-up failed,it sends notifications to hell lot of people which are invalid or unncecessary users. This list is in the domain Admins. I can't delete them manually. 

Is there a script to delete the users or modify the sending list?
I believe your primary issue is that you have this group of users in the [Team Foundation]\Team Foundation Administrators group or possibly many users added with privileges to the Administration Console Users, which is unusual.  To adjust who is part of the Team Foundation Administrators group:


RDP to the server that hosts the application tier for your TFS installation
Open the TFS Administration Console
Highlight the Application Tier
Click the Group Membership link
Double-click [Team Foundation]\Team Foundation Administrators
Adjust membership of the group


To learn more about configuring administrators from the TFS Administration console, see Microsoft's documentation on the topic.