This is a known issue
Rights
You may get a rollback due issues with permissions in the registry
Description of how to establish a proper connection to Acronis Agent on Microsoft Exchange Server from Acronis Recovery for Microsoft Exchange Management Console
Assign the SQL user administrator rights and reattempt the installation
What parameters should be checked if you change the account under which Acronis Backup & Recovery 10 services run
Acronis Backup & Recovery 10: Backup Fails with "Failed to create the substitute user logon session"
Add user to the "Bypass traverse checking" and "Act as part of the operating system" security policies
The user does not have write access on the FTP server
How to set up user permissions on centralized vaults
The user account needs to have specific database access privileges
The user under which you are trying to install is part of the "Deny log on as a service" user rights assignment policy
By default, MS SharePoint on Windows SBS does not have any MS SQL user with the sysadmin role.
You need to assign the sysadmin role for proper Acronis SharePoint operation.
Take the following steps to give any Windows user an MS SQL sysadmin role:
Symptoms
An attempt to connect to an Acronis Agent or Acronis Management Console fails with an error similar to the following one:
Failed to establish connection using the specified credentials
Cause
The user under which you are trying to connect does not have enough privileges.
List of local and remote management rights for regular users and standard Acronis users
Symptoms
Backup fails with the following error:
Windows error: (0x80070522) A required privilege is not held by the client
How to add the necessary rights to users for Acronis backup software
AcronisInfo is a utility that automatically gathers User Rights Assignment list, Windows Event Log, Msinfo32, Acronis registry keys, Acronis logs, Acronis Scheduler report, Acronis Disks Report and list of user’s Active Directory groups