Hello,

Were running Exchange 2010 DAG across 2 sites in the following scenarios.

Site-1:

OWA and RPCClientAccessServer name        : site1.abc.com

Site-1 DB                                                  : Site-1 users mailbox DB (Active)

Site-2 DB                                                  : Site-2 users mailbox DB (Passive)

Site-2:

OWA and RPCClientAccessServer name        : site2.abc.com

Site-1 DB                                                  : Site-1 users mailbox DB (Passive)

Site-2 DB                                                  : Site-2 users mailbox DB (Active)

Users in Site 2 need to access their mailbox (Site-2 DB) and some shared mailboxes (Site-1 DB) from the single Outlook profile. We assign necessary FullAccess permission for users on the shared mailboxes so that users can use their own single user account to access both personal mailbox and shared mailbox(es).

Site 2 users Outlook configuration:

Outlook 2010 profile configuration                : Single account (with additional mailboxes under Advanced tab)

DB Server                                                   : site2.abc.com

HTTP proxy server                                       : site2.abc.com

The above environment was working well until we upgrade Exchange 2010 SP2 Rollup 6. I understand that the DAG setting AllowCrossSiteRpcClientAccess takes effect since SP2 rollup 3. Ive configured Cross-site access to True but users in Site 2 still cannot access shared mailboxes active/hosted in Site1 using the above Outlook 2010 profile configuration.

My question is wither it is possible for Site-2 users to use CAS server site2.abc.com to access shared mailboxes hosted/active in Site-1 DB in a single account Outlook profile. Than

Hi

Im sorry to reply so late, I did some research yesterday, AllowCrossSiteRPCClientAcces $ ture  allow cross site RPC access without requiring your users to restart Outlook when their active database is moved to another AD Site.

Can you add the shared mailbox to the same profile or can you access the shared mailbox use a new pr

Hi Wendy,

Thank you for your reply.

I'd like to point out our environment a bit more to clearify the problem.

We are using different RPCClientAccessServer for those 2 different databases so that users will connect to their personal mailboxes closest to their location.

In this case, the RPCClientAccessServer value for 2 databases are as follows:

Site-1 DB     : site1.abc.com

Site-2 DB     : site2.abc.com

The problem is that Site-2 users' mailboxes are on "Site-2 DB" and the required shared mailboxes are on "Site-1 DB". Those 2 databases are configured with different RPCClientAccessServer names.

Problem:

When site-2 user configure their personal mailbox profile and add shared mailboxes (Site-1 DB) under "Advanced" tab, they CANNOT access shared mailboxes.

Alternate method:

I tested using 2 Exchange accounts in a single profile (personal account "Site-2 CAS server" and shared mailbox "Site-1 CAS server") and it works well.

But, wanted to know why a single profile, single account with additional mailboxes (Advanced tab) worked before we applied latest SP/rollup.

Is that by design or my configuration problem?

Thank you.