Some users can't login to OWA exchange 2010 after move from 2003

Hi all, I can't seem to figure out this issue, I'm currently moving old users from my old 2003 exchange to 2010 running on 2012 svr, some users I moved earlier can access owa fine but some newer moves can't.

I tried running the exch-connectivity test and I got some errors about http code 301 in IIS, here's 2 where one failed and the other was ok, any ideas or pointers would be great, thanks in advanced.

[PS] C:\Windows\system32>Test-OwaConnectivity -MailboxCredential (get-credential domain\dcockcroft) -URLhttps://mail.cirexx.com/owa -TrustAnySSLCertificate | FL
WARNING: [11:07:03.407] : The HTTP logon request returned the non-OK result code 301 (MovedPermanently).
WARNING: [11:07:03.423] : The test encountered an error while signing in to Outlook Web App.
HTTP code: 301
WARNING: [11:07:03.423] : Test failed for URL 'https://mail.cirexx.com/owa/'.

RunspaceId                  : 13181ef2-d11e-42f0-89de-6d7f17e4b0d9
AuthenticationMethod        : FBA
MailboxServer               :
LocalSite                   : Cirexxbdg1
SecureAccess                : True
VirtualDirectoryName        :
Url                         :https://mail.cirexx.com/owa/
UrlType                     : Unknown
Port                        : 0
ConnectionType              : Plaintext
ClientAccessServerShortName :
LocalSiteShortName          : Cirexxbdg1
ClientAccessServer          :
Scenario                    : Logon
ScenarioDescription         : Sign in to Outlook Web App and verify the response page.
PerformanceCounterName      : Logon Latency
Result                      : Failure
Error                       : The test encountered an error while signing in to Outlook Web App.
                              HTTP code: 301
UserName                    : dcockcroft
StartTime                   : 6/5/2013 11:07:02 AM
Latency                     : -00:00:00.0010000
EventType                   : Error
LatencyInMillisecondsString :
Identity                    :
IsValid                     : True

[PS] C:\Windows\system32>Test-OwaConnectivity -MailboxCredential (get-credential domain\atg) -URLhttps://mail.cirexx.com/owa -TrustAnySSLCertificate | FL

RunspaceId                  : 13181ef2-d11e-42f0-89de-6d7f17e4b0d9
AuthenticationMethod        : FBA
MailboxServer               :
LocalSite                   : Cirexxbdg1
SecureAccess                : True
VirtualDirectoryName        :
Url                         :https://mail.cirexx.com/owa/
UrlType                     : Unknown
Port                        : 0
ConnectionType              : Plaintext
ClientAccessServerShortName :
LocalSiteShortName          : Cirexxbdg1
ClientAccessServer          :
Scenario                    : Logon
ScenarioDescription         : Sign in to Outlook Web App and verify the response page.
PerformanceCounterName      : Logon Latency
Result                      : Success
Error                       :
UserName                    : atg
StartTime                   : 6/5/2013 11:17:05 AM
Latency                     : 00:00:00.2343922
EventType                   : Success
LatencyInMillisecondsString : 234.39
Identity                    :
IsValid                     : True