Job reports warning:
SQL VSS Writer is missing: databases will be backed up in crash-consistent state and transaction log processing will be skipped
Running the command vssadmin list writers shows that 'SqlServerWriter' is not active.
There are different causes of the issue:
Below is a list of possible solutions that have been reported to us by customers from previous support cases.
Veeam is not responsible for any issues incurred after making the suggested changes. You are advised to contact and review all setting changes with the respective product support organization.
Reported causes\solutions to fix the SQL VSS Writer not be present on a SQL Server:
select '#' + name +'#' from sys.databases where name like '% %'
Microsoft documentation states that the SQL Writer service must run as Local System.