Cannot access 'Manage SBS Backup'
Situation: When you try to access the "Manage Small Business Server Backup" inside "Server Management", and you get the following message:
“You do not have the correct permissions to view this page. For more information contact your system administrator. To view this page, you must be a member of the Domain Admins security group.“
Solution:
Go to IIS manager
Open the Default Website and you should see the Backup virtual directory.
Right click Backup and select Properties.
Go to the Directory Security tab, click Edit in Authentication and access control.
Verify Integrated Windows Authentication is the only authentication method.