I have been facing issues with Exchange 2010 SP1 / Zimbra free busy interop. The requirement is to have split domain environment setup where few mailboxes host on exchange 2010 SP1 while the rest stay on zimbra.

In test environment, mail routing, galsync and AD authentication working fine. The zimbra users are able to see the freebusy status of the exchange users but exchange users are not able to see zimbra users status.

It seem zimbra users are unable to post the FB information to exchange public folder. IIS log doesn’t reveals much and zimbra mailbox logs shows the following...

2012-10-19 23:59:09,861 ERROR [EXCHANGE2010 Free/Busy Sync Queue] [] fb - error while syncing freebusy for EXCHANGE2010
at com.zimbra.cs.account.ldap.LdapProvisioning.fixupA ccountName(LdapProvisioning.java:751)
at com.zimbra.cs.account.ldap.LdapProvisioning.getAcc ountByNameInternal(LdapProvisioning.java:789)
at com.zimbra.cs.account.ldap.LdapProvisioning.getAcc ountByName(LdapProvisioning.java:773)
at com.zimbra.cs.account.ldap.LdapProvisioning.getAcc ountByName(LdapProvisioning.java:768)
at com.zimbra.cs.account.ldap.LdapProvisioning.get(Ld apProvisioning.java:679)
at com.zimbra.cs.account.ldap.LdapProvisioning.get(Ld apProvisioning.java:664)
at com.zimbra.cs.fb.ExchangeEWSFreeBusyProvider$Basic UserResolver.getServerInfo(ExchangeEWSFreeBusyProv ider.java:180)
at com.zimbra.cs.fb.ExchangeEWSFreeBusyProvider.getSe rverInfo(ExchangeEWSFreeBusyProvider.java:938)
at com.zimbra.cs.fb.ExchangeEWSFreeBusyProvider.handl eMailboxChange(ExchangeEWSFreeBusyProvider.java:49 9)
at com.zimbra.cs.fb.FreeBusyProvider$FreeBusySyncQueu e.run(FreeBusyProvider.java:263)
at java.lang.Thread.run(Thread.java:662)

The required mail-enabled contacts are created in AD for each zimbra users. Respective Foreign Principals are also set in zimbra.

Exchange is using self signed certificate that has also been imported to zimbra.

FreeBusy interop is configured globally and the configuration is as follows

[zimbra@str1 root]$ zmprov gacf | grep zimbraFreebusyExchange
zimbraFreebusyExchangeAuthPassword: P@ssw0rd
zimbraFreebusyExchangeAuthScheme: basic
zimbraFreebusyExchangeAuthUsername: Interop2010@test-mail.com
zimbraFreebusyExchangeCachedInterval: 60d
zimbraFreebusyExchangeCachedIntervalStart: 7d
zimbraFreebusyExchangeServerType: ews
zimbraFreebusyExchangeUserOrg: EX:/o=First Organization/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)

any idea what to do to fix this issue?


Zimbra - Release 7.1.3_GA_3346.RHEL6_64_20110928134428 RHEL6_64 FOSS edition.
Exchange - 2010 SP1