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Recurring Appointment Partial Expansion Model

[Applies to: Microsoft Dynamics CRM 2011]

Microsoft Dynamics CRM implements a partial expansion model to create recurring appointment instances in the database. The recurrence information, specified when you create a RecurringAppointmentMaster record, is used to create or synchronize individual instances in a phased manner. This controls the creation of a large number of appointment records in Microsoft Dynamics CRM due to the creation or synchronization of recurring appointments that have a large or infinite (no end date) recurrence range.

The partial expansion model is an asynchronous job in Microsoft Dynamics CRM that runs at pre-specified intervals, and is defined at the organization level using the Organization.RecurrenceExpansionJobBatchInterval attribute. Moreover, the instance expansion model depends on an organization-level parameter, for example, “N,” where “N” stands for the maximum number of instances that can be created synchronously. You can specify an appropriate value for this variable using the Organization.RecurrenceExpansionSynchCreateMax attribute. These properties are covered in detail in the Parameters for the Partial Expansion Job section later.

In This Topic

When the Recurring Appointment Instances are Less Than or Equal to “N”

If the number of instances to be generated because of the recurrence information is less than or equal to “N”, the actual number of instances are created synchronously from the effective start date of the appointment. Each instance is stored as an appointment record in Microsoft Dynamics CRM.

When the Recurring Appointment Instances are More than “N”

For each recurring appointment created in Microsoft Dynamics CRM, an asynchronous expansion job is created. The instances of the recurring appointment are expanded in the following phases:

  1. Synchronous expansion: The first “N” instances of the recurring appointment are created synchronously from the effective start date. Each instance is stored as an appointment record with the Appointment.InstanceTypeCode attribute set to “2” (Recurring Instance). See ActivityPointer (Activity) Entity OptionSet Attribute Metadata. The expansion of the rest of the instances is passed on to an asynchronous job. The effective start date is the date from which the recurring appointment series has to be expanded.

  2. Asynchronous expansion: Asynchronous jobs handle the rest of the expansion job and periodically expand the instances according to the recurrence information. The asynchronous expansion occurs only until the future expansion window (Organization.FutureExpansionWindow). After that, a new asynchronous job is created that handles expansion until the next future expansion window. The asynchronous service periodically expands the instances and stores them as appointment records in the system.

Parameters for the Partial Expansion Job

You must set appropriate values for these organization-level attributes in the Organization record for the expansion model to work as per your requirements. You must have the System Administrator role or appropriate privilege to do this. The following table provides information about these properties.

 

Attribute Description

Organization.RecurrenceExpansionSynchCreateMax

This is the maximum number of appointment instances that is created at the time of creation or synchronization of a recurring appointment. You must specify an integer value that corresponds to the number of instances. This value corresponds to “N”.

Organization.PastExpansionWindow

This is the maximum valid time period in the past up to which the recurring appointments can be expanded or synchronized with Microsoft Dynamics CRM for Microsoft Office Outlook. You must specify an integer value that corresponds to the number of months.

The value of this attribute determines the past instance cutoff date for expanding or synchronizing the recurring appointment instances.

Organization.FutureExpansionWindow

This is the maximum valid time period in the future up to which the recurring appointments can be expanded or synchronized with Microsoft Dynamics CRM for Outlook. You must specify an integer value that corresponds to the number of months.

The value of this attribute determines the future instance cutoff date for expanding or synchronizing the recurring appointment instances.

Organization.RecurrenceExpansionJobBatchInterval

This is the frequency in seconds after which the partial expansion job is triggered.

Organization.RecurrenceExpansionJobBatchSize

This is the number of instances expanded every time the asynchronous job runs.

See Also

Microsoft Dynamics CRM 2011
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