Symantec Endpoint slows backups and network activity on servers

We are running Symantec Backup Exec 2012 patched to the latest version and the job rate is very slow when Symantec Endpoint Protection Virus Scan is enabled on the server.
It can slow from 3-4000Mb per min to 90 - 150Mb per min.
Not only that but the virus scan appears to slow down people accessing files through shared drives.
If I try to perform a copy of 2Gig of data between two servers it can take up to 5-6 minutes when the virus scanner is enabled. Disabled it only takes around 40 seconds.
We are running Endpoint Protection version 12.1.4 but had the same issue running version 12.1.3
StratfrordDCAsked:
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StratfrordDCConnect With a Mentor Author Commented:
Disabled Network Threat Protection on two servers with this issue.
Backup speeds back to normal.
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JohnBusiness Consultant (Owner)Commented:
I would expect some overhead from virus scanning on this operation.

However, in SEP, look (client and/or server) at the Scan Settings. Perhaps it is running a daily scan that could be moved to a different time than the backup. I think I would start here.

If client machines are left on idle overnight make sure client SEP activities are not conflicting with backup times.

Finally, look to see when Live Update is pushing out updates to clients.

In other words, look at the activity times and move them away from backup times.

... Thinkpads_User
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StratfrordDCAuthor Commented:
Resolved the issue and was recommended by Symantec.
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