I added a new Windows Server 2012 R2 standard server to one of our Veeam backup jobs, and it was failing with the following error:
Failed to prepare guest for hot backup. Error: Failed to connect to guest agent. Errors:
'Cannot connect to the host's administrative share. Host: [192.168.0.x]. Account: [DOMAIN\VBRbackup].
Win32 error:The network name cannot be found.
Code: 67
'
Note that the DOMAIN\VBRbackup account is a member of the Domain Admins group, has logon as service rights, is a member of the local administrators group on the MACEQT1 server, and even log on locally rights. UAC was disabled and the server rebooted.
After working with Veeam Support, they pointed me to the following article on how Windows 8 handles UAC differently than Windows 7, much the same as Windows Server 2012 R2 vs Server 2008 R2.
http://www.petri.co.il/disabling-user-a ... ows-8.htm#
After disabling all the UAC group policies on the server, application level quiesced backups started working.
Hope this helps someone else out there
