Error: 18456, Severity: 14, State: 5.Login failed for user 'domain\user'. Reason: Could not find a login matching the name provided.Issue Windows discovery is generating alerts on the SQL Servers with the following error: Error: 18456, Severity: 14, State: 5. Login failed for user 'domain\user'. Reason: Could not find a login matching the name provided. [CLIENT: ]ReleaseAll release.CauseThis happens when the access rights to the discovery credentials have not been provided. If we examine the 'MSSql DB on Windows' pattern, we can clearly see the error. ResolutionThis solution is to provide proper access rights to the discovery credentials as mentioned in the link below. MSSql Server Discovery Credential