error message Backup exec server

Hello,
I'm getting the following error message on the backup exec server every 5 minutes.  
(in the Event viewer  the level is information)

Apparently all is fine but I would like to know what the problem exactly is .
Thank you
Carlo

We use backup exec 12 version 14.2 rev.1180 (64 bit)




Log Name:      Application
Source:        MSSQL$BKUPEXEC
Date:          9/30/2015 1:54:42 PM
Event ID:      18456
Task Category: Logon
Level:         Information
Keywords:      Classic,Audit Failure
User:          contoso\dom-backupadmin
Computer:      hq99.contoso.ORG
Description:
Login failed for user 'contoso\dom-backupadmin'. Reason: Failed to open the explicitly specified database. [CLIENT: 127.0.0.1]
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="MSSQL$BKUPEXEC" />
    <EventID Qualifiers="49152">18456</EventID>
    <Level>0</Level>
    <Task>4</Task>
    <Keywords>0x90000000000000</Keywords>
    <TimeCreated SystemTime="2015-09-30T11:54:42.000Z" />
    <EventRecordID>8906175</EventRecordID>
    <Channel>Application</Channel>
    <Computer>hq99.contoso.ORG</Computer>
    <Security UserID="S-1-5-21-1606980848-162531612-839522115-28608" />
  </System>
  <EventData>
    <Data>contoso\dom-backupadmin</Data>
    <Data> Reason: Failed to open the explicitly specified database.</Data>
    <Data> [CLIENT: 127.0.0.1]</Data>
    <Binary>184800000E0000000E00000048005100390039005C0042004B005500500045005800450043000000070000006D00610073007400650072000000</Binary>
  </EventData>
</Event>
CarloAsked:
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Vitor MontalvãoMSSQL Senior EngineerCommented:
Looks like contoso\dom-backupadmin doesn't have backup rights on the SQL Server instance.

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CarloAuthor Commented:
hello,
you are right ..... Symantec sent me this link . this is probably due to an upgrade and a domain migration on that machine.

here is the article.
SQL Event 18456 during file backup of SQL server:
Please find the Tech article:
  http://www.symantec.com/docs/TECH203945
CarloAuthor Commented:
solution found
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