Microsoft System Center DPM 2012 R2 - Exchange 2013 Backup Error

We recently upgraded our Exchange to 2013. The DPM agent installed perfectly on the Exchange server, but the backups on the DPM server running Windows Server 2012 reported constant failures.
The backup fail, with this error :

Type: Consistency check
Status: Failed
Description: Data consistency verification check failed for LOGS of Exchange Mailbox Database Mailbox Database 11111 on Mail.domain.local. (ID 30146 Details: Unknown error (0xc0000135) (0xC0000135))

The fix is to install Visual C++ Redistributable for Visual Studio 2012 Update 4 x64 from here:
http://www.microsoft.com/en-us/download/details.aspx?id=30679

Exchange 2013 SP1 anti-malware updates not working

On a fresh install of Exchange 2013 SP1 anti-malware updates are not working. In event viewer we get following error:

Log Name:      Application

Source:        Microsoft-Filtering-FIPFS

Date:          3/21/2014 9:16:06 PM

Event ID:      6027

Task Category: None

Level:         Error

Keywords:     

User:          NETWORK SERVICE

Computer:      Mail.domain.local

Description:

MS Filtering Engine Update process was unsuccessful in contacting the Primary Update Path. Update Path: http://forefrontdl.microsoft.com/server/scanengineupdate

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="Microsoft-Filtering-FIPFS" Guid="{1BE3A000-EA09-4AB8-B0A0-30BBB6793D80}" />

    <EventID>6027</EventID>

    <Version>0</Version>

    <Level>2</Level>

    <Task>0</Task>

    <Opcode>0</Opcode>

    <Keywords>0x8000000000000000</Keywords>

    <TimeCreated SystemTime="2014-03-21T19:16:06.892015100Z" />

    <EventRecordID>163920</EventRecordID>

    <Correlation />

    <Execution ProcessID="2044" ThreadID="8468" />

    <Channel>Application</Channel>

    <Computer>Mail.domeniu.local</Computer>

    <Security UserID="S-1-5-20" />

  </System>

  <EventData>

    <Data Name="UpdatePath">http://forefrontdl.microsoft.com/server/scanengineupdate</Data>

  </EventData>

</Event>

I have checked also on a similar test environment and I get same error.

Solution to solve this issue is to give to "Network Service" account to have full control, or at least "write" access on \Program Files\Microsoft\Exchange Server\V15\FIP-FS\Data\Engines\amd64\Microsoft\bin .

After this change updates are working properly.