When I use powershell to set backup mode, I don't run it from the local EVserver. I control all my backups from a remote server.
Both servers are 64bit, and EV is 32bit, so I had some interesting challenges. By default, Powershell runs in 64bit mode and doesn't work with EV. I figured out how to connect specifically to the 32bit powershell on the remote server (EVServer), load the EV snapin, then send commands to that remote session.
Start a Powershell session on a remote server, load the EV snapin, and issue the command to set backup mode
# 1. Connect to EV1 server and sets the VaultStore and IndexLocation into backup mode
$evServerSession = New-PSSession -computername evServer -ConfigurationName Microsoft.Powershell32
Invoke-Command -Session $evServerSession -scriptblock {Add-PSSnapin Symantec.EnterpriseVault.PowerShell.Snapin}
Invoke-Command -Session $evServerSession -scriptblock {set-vaultstorebackupmode -name 'EMail Vault Store Group' -evservername EVServer -evobjecttype vaultstoregroup}
Invoke-Command -Session $evServerSession -scriptblock {set-indexlocationbackupmode -evservername EVServer}
# Clean up the session
Remove-PSSession -ComputerName evServer
# 4. take it out of backup mode
Invoke-Command -Session $evServerSession -scriptblock {clear-vaultstorebackupmode -name 'Email Vault Store Group' -evservername EVServer -evobjecttype vaultstoregroup}
Invoke-Command -Session $evServerSession -scriptblock {clear-indexlocationbackupmode -evservername EVServer}
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When we were getting started with EV, backups took less than an hour, and I just re-used the session to take EV out of backup mode. Once we migrated all our old email into EV backups were taking up to 50 hours, and my commands to take EV out of backup mode were failing. I think that my remote powershell session was timing out. I changed the script to close the original session after entering backup mode, then start a new session to take it out of backup mode, but there was errors (syntax somewhere, I think, still troubleshooting it).
Anyway, I hope that this information can help someone else.
