Exchange 2003->2010 Migration, Free/Busy issue

exchange-2010outlook-2003public-folders

We just finished a migration from Exchange 2003 to 2010 (old servers have been removed from the org, wiped, etc) and most everything seems to be working. I do have an issue with Outlook 2003 users – they cannot view the Free/Busy information of other users. Running outlook with /cleanfreebusy results in a dialog stating that outlook is unable to clean the free/busy information on the server. Upgrading the user to Outlook 2010 had no impact. Users who were on Outlook 2007/2010 prior to shutting down the Exch 2003 machines do not seem to be affected.

I did find a KB article (http://support.microsoft.com/kb/945602/en-us) that seems to be relevant, but there already is a replica for the Exch2010 pub folder. However, it still has the old Exch org listed in free/busy… is this a problem? Should I just add a replica to that one? Should it be deleted?

get-publicfolder -Identity "\NON_IPM_SUBTREE\SCHEDULE+ FREE BUSY" -Recurse | fl name,Replicas


Name     : SCHEDULE+ FREE BUSY
Replicas : {}

Name     : EX:/o=ExchOrgName/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)
Replicas : {Public Folder Database 1878261148}

Name     : EX:/o=ExchOrgName/ou=OldAdminGroup
Replicas : {}

Best Answer

Check to see if you have more than one public folder in the AD schema. Easiest way is to go to EMC and select Toolbox -> Public Folder Management Console. Then connect to the server. If you try to browse and get error for "Multiple MAPI public folder trees detected" you need to do the following:

  1. Open ADSI edit and connect to Configuration naming context.
  2. Copy the name of this context e.g. CN=Configuration,DC=domain,DC=tld
  3. Run in cmd the following LDIFDE -f c:\Config.txt -d "CN=Configuration,DC=domain,DC=tld". This will create a txt file with searchable configuration.
  4. Search for msExchPFTreeType containing value of 1. These are active PF that may create problems for exchange and old Outlooks.
  5. Go back to ADSI edit and find the given properties and change them to 0. This will disable them and allow Public Folder Management Console to display the settings correctly.

After the migration we had 2 PF the one from Exchange 2010 in 

CN=Public Folders,CN=Folder Hierarchies,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=BRAVO,CN=Microsoft Exchange,CN=Services,DC=dimain,DC=tld

and one from Exchange 2003 in:

CN=Public Folders,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=dimain,DC=tld

Also if you do not have such error you could check this article to redirect the PF server for the administrative group.

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