Moving clients to a new server with A NEW name from a 2003 server to 2012

Question

we want to move from our Sophos enterprise console to another machine this will have a new Name 
 the old one must keep running until we have all the clients moved to the new server ID DONT WANT THE HISTORY we want to start again! 
 Installed the new server as per the KB articles 
 All seemed well but the clients seem to have an issue, I deployed the client from the new console Over the top of the old managed server client it reinstalled but came back with this error 
 
 Sophos AutoUpdate status Date/time Code Description 17/01/2017 11:56:44 0000006b Download of Sophos Endpoint Defense failed from server \NEW SERVER\SophosUpdate\CIDs\S000\SAVSCFXP\ 
 If I uninstall the Sophos Av from the client and remove all reg entries and left over dll files then deploy from the new server I do not get this error it works ok ! 
 help would be appreciated I tried goggling the description error but haven't found anything useful 
 so its just How to redirect windows endpoints to a new server 
 I followed this KB even trying the scripted routes but it still fails with the same error

QC · Accepted Answer

Hello nigel parker , 
 it's not just 10.6 but the minor that's important - 10.6. 4 does have SED, 10.6. 3 doesn't. So you should check the version of the endpoints (clients) on the old server (tab Anti-virus Details , column Anti-virus version ). The SEC version doesn't matter, the subscription does. If it's indeed the case that 10.6.4 was already in use you can either subscribe to Preview on the new server or ignore the message until 10.6.4 is GA. 
 Downgrading of the components is supported when you re-protect but only known features are uninstalled. 10.6.3 isn't aware of the new SED so its installer doesn't uninstall it. [Edit] Not sure now if above this is correct - just tested a downgrade by assigning Recommended to an endpoint running 10.6.4, the SED is correctly uninstalled. Haven't tested a re-protect from the console though. [/Edit] 
 [just saw your other post] The normal updating log doesn't really help in troubleshooting an error that's not immediately obvious. For this purpose the detailed ALUpdate log is required. Anyway I think the Could not connect to the server is misleading here. So please check the involved endpoint versions. Apart from this - I daresay: rather minor - issue everything seems to work. 
 Christian

QC · Answer

Hello nigel parker , 
 Sophos Endpoint Defense is new with 10.6.4. Looks like you've subscribed to Preview on the old server. If you re-protect with 10.6.3 the associated information for AutoUpdate isn't cleared, subsequently it's searching for the product but fails. 
 Christian