The mailbox test fails when connecting to Exchange 2013.
First verify the 2013 version of the MAPI CDO is installed.
In Contorl Panel | Programs and Features find "Microsoft Exchange Server MAPI Client and Collaboration Data Objects 1.2.1" and verify the version is 6.5.8320 or greater.
If needed install the updated CDO.
1. Stop and Disable the 3 QCS services. Note: Stop the watchdog service first.
2. Uninstall the current MAPI CDO (Microsoft Exchange Server MAPI Client and Collaboration Data Objects 1.2.1)
3. Reboot your server.
4. Install the 2014 version of the MAPI CDO https://www.microsoft.com/en-ca/download/details.aspx?id=42040
5. Reboot your server again.
6. Set the 3 QCS services back to automatic and start.
Verify the mailbox used by the service account is on an Exchange 2013 Mailbox Server and verify that it can be accessed using OWA.
From the QCS Server open Internet Explorer and enter the address of your CAS Server and verify there is no Certificate errors. If needed you may need to install the Certificate as a trusted root certificate. The name used here will be added to a registry value below. ie: CASArray.company.com
Open Regedit and navigate to
For an x64 server [HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Aelita\AelitaCollaborationServices\]
For an x86 server [HKEY_LOCAL_MACHINE\SOFTWARE\Aelita\AelitaCollaborationServices\]
Add the following Key "RpcHttpProxy"
Right click on your new Key and add the Following string value replacing CASArray.company.com with the FQDN of RPC Proxy CAS Server.
Value Name: RpcHttpProxyServer
Value Data: "CASArray.company.com"
*Note: If SSL is Required for RPC over HTTP traffic prefexi the RpcHttpProxyServer Name with "https://"
Restart the "Quest Collaboration Services Synchronization Service"
After the service restarts open the QCS Console and go to Collaboration Services Properties.
Under Service Mailbox specify the name of the Exchange 2013 Mailbox server where the service mailbox resides.
Click the Test Mailbox button.