Category: General

Admin$ share inaccessible from network:

This is often found as a Veeam Backup warning error which is as follows:

Failed to prepare guest for hot backup. Details: Failed to connect to guest agent. Errors: 'Cannot connect to the host's administrative share. Host: [xx.xx.xx.xx. Account: [username. Win32 error:No network provider accepted the given network path. Code: 1203 Cannot connect to the host's administrative share. Host: [xx.xx.xx.xx. Account: [username. Win32 error:Access is denied. Code: 5 Cannot connect to the host's administrative share. Host: [xx.xx.xx.xx. Account: [username. Win

To resolve, first go to your backup server running veeam, or just the workstation that is unable to access the share and test a manual connection:

xx.xx.xx.xxadmin$

You should be prompted for a login, so use the same account that is failing. If this does not work, go to the relevant server and ensure that the share is accessible locally from an RDP session.

If it is, check the obvious, local/external firewall (if applicable), network connectivity, username, password, share permissions, NTFS permissions etc.
If its only accessible via the “administrator” account, but not from another account which is in the “administrators” group, then add the following setting in the registry:

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionPoliciesSystem
Right click > New > DWORD (32-bit) Value
LocalAccountTokenFilterPolicy > ENTER
Right-click > LocalAccountTokenFilterPolicy > Modify
In the Value data box, type 1 > OK

Now try again, the share should be accessible.

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