Hi,
I've been looking into a problem now for a couple of weeks which I dont seem to be able to resolve! I'm in the process of migrating users from Exchange 2007 to Exchange 2010 SP1. Clients range from Outlook 2003 up to Outlook 2010. For a couple of Outlook 2010 (using cached mode) users that I have moved to Exchange 2010, they get random prompts to say that the Exchange Administrator has made changes....including myself. Needless to say I am not making any changes at the time they get the prompt. Our enviroment consists of two physical hosts which hold CAS, Mailbox and Hub roles and two Kemp hardware load balancers. We have a Cas Array which directs the users to the HLB virtual IP address. I have enabled Outlook debugging and can't see anything helpful in those logs, I have checked the HLB logs and also cannot see anything worth mentioning.
The issue seems to be when users (who all have laptops) move from wireless back to the wired LAN; each of these is a different vlan at our office - so when they dock their laptops back with Outlook open they get the prompt...having said that we do have some desktop users who have had the prompt...
Below is a summary of the troublshooting steps I've gone through so far....
1. Re-create the ost file, this didnt work so re-created new Outlook profile
2. Bypass the load balancers by editing the local hosts file to point so that the cas array DNS name resolves to the actual server name rather than the IP of the HLBs
The only thing that I have found is in the RPC Client access logs on each server where around about the same time a user get the error we get something similar to;
2012-10-12T09:13:39.803Z,56122,1,/o=Finning Ltd./ou=UK/cn=Recipients/cn=twalker,,OUTLOOK.EXE,11.0.8303.0,Classic,,,ncacn_ip_tcp,,PublicLogon,1144 (rop::WrongServer),00:00:00,"Logon: Public, in database 613223a7-e115-48bd-b16b-ba5d62d92277 last mounted on UKSF000-EXG20.uk.FINNING.COM at 05/09/2012 19:20:44, currently Mounted; Redirected: not a user's home public server, suggested new server: /o=Finning Ltd./ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Configuration/cn=Servers/cn=UKSF000-EXG20",RopHandler: Logon:
I can see this error in relation to this http://support.microsoft.com/kb/2535105/en-us however we do not experience high CPU usage and the Outlook users having this issue can view the public folders without any issues so I do not believe it to be the same problem exhibited above.
Has anyone else come across this error or have any tips to help me identify what the root cause of the problem is? I've been trying to figure it out for ages now!
Thanks in advance