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Collaboration Services 3.9.1 - User Guide

Getting started with Collaboration Services Organizing objects for synchronization Resolving synchronization conflicts Managing the synchronization process Transport management Fine-tuning and maintenance Backup, restore, and troubleshooting

Namespace usage

For each original object, Collaboration Services creates a stub object in the forests that subscribe to the collection. The mail received by this stub should be redirected to the original object’s email address.

Since mailbox-enabled object can have more than one proxy address, Collaboration Services should select which of them is to be used for mail redirection from stub object.

To choose the redirection address, Collaboration Services does the following:

1
If the object's targetAddress attribute is populated, that will be used.
2
If the targetAddress attribute is not available, the primary SMTP address is used.
3
If neither address is available, redirection address will be set to the first matching proxy address found in the Namespaces page of the Collaboration Services Properties dialog box. The namespaces listed there are in priority order.
* 
NOTE: If none of the retrieved addresses is encountered in the specified namespace, no stub object will be created.

The Namespaces page of the Collaboration Services Properties dialog box allows you to add new namespaces or edit existing namespaces if your policy has changed since Collaboration Services setup.

Figure 7. Namespaces

Free/Busy information synchronization settings

Synchronized free/busy information is kept on the Exchange server that stores the free/busy public folder for the administrative group containing the Exchange server where the Collaboration Services service mailbox resides.

So, if your Exchange deployment contains multiple administrative groups, the groups must access free/busy information using either public folder referrals or free/busy folder replication. Please see the appropriate Microsoft Exchange server documentation for more information.

The free/busy information synchronization process is performed as follows:

1
Collaboration Services periodically checks whether any changes were made to the free/busy information of the published objects.
2
When the service detects such changes, it creates update data packets and sends them to the HQ forest for distribution to subscribers.
3
Collaboration Services applies the free/busy information changes to the stub objects of the collections the forest is subscribed to based on the frequency settings you select.

General settings

Use the General page to adjust the frequency of scanning for updates and applying changes:

Figure 8. Free/busy general options
Publication settings
•
Query Free/Busy for changes every:
Specify how often Collaboration Services should check for changes to the free/busy information of the published objects.
Subscription settings
•
Update Free/Busy every:
Specify how often Collaboration Services should apply the free/busy information changes to the stub objects of the collections the forest is subscribed to.
Advanced subscription settings
•
Wait for missing packets for
Specify how long the service should wait for missing data packets with free/busy information before automatically re-publishing this information.
* 
NOTE: Increasing this value lessens the load on Collaboration Services and the Exchange server, but makes the free/busy information less accurate.
•
Scan Active Directory for required objects every
In mixed collections (that is, intended for synchronization of several types of information), an object’s free/busy information may be received before the object itself. In such cases, the free/busy information cannot be published right away.
Use this value to specify how often the service should scan Active Directory for the appearance of objects to which the free/busy information should be applied.

Scheduling

To avoid excessive load during production hours on the Exchange server where free-busy information is kept, schedule Collaboration Services to access the free/busy folder for the least busy time periods.

* 
NOTE: Free/busy access schedules must be thoroughly coordinated, especially when some of the collaboration partners are located in different time zones; otherwise, synchronization performance may be poor.
To schedule free/busy folder access
1
On the Scheduling page, select the Use Free/Busy access scheduling check box.
2
Specify the time intervals when the service is allowed to read and update free/busy information on the Exchange server.
* 
NOTE: If you allow access to the free/busy information in off hours only, the updated free/busy information will not be propagated to the other forests until the next day.
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