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Guest Processing for Microsoft SQL Server Results in Logon Failure Error

KB ID: 2689
Product: Veeam Backup & Replication | 9.5 | 10 | 11 | 12 | 12.1 | 12.2 | 12.3 | 12.3.1 | 12.3.2 | 13
Published: 2018-07-13
Last Modified: 2026-05-01
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Challenge

When performing any of the following operations, the following error occurs:

  • Back up of SQL Server transaction logs.
  • Truncation of SQL Server transaction logs.
  • Collection of SQL instances metadata for Veeam Explorer for Microsoft SQL.

While the error message varies depending on the actual operation, there is a common error thrown in the job sessions:

Logon failure: the user has not been granted the requested logon type at this computer. Code: 1385

Cause

This issue occurs due to missing required permissions.

Solution

The account specified for use with Application-Aware Processing must be granted the required guest processing permissions on the SQL server.

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