The ExchangeWebServices namespace name is an arbitrary name. The namespace is determined when the proxy classes are created using wsdl.exe or the Add Web Reference in Visual Studio 2005.

 Classes

Class	Description
AbsoluteMonthlyRecurrencePatternType	The AbsoluteMonthlyRecurrencePatternType class represents a monthly recurrence pattern.
AbsoluteYearlyRecurrencePatternType	The AbsoluteYearlyRecurrencePatternType class represents a yearly recurrence pattern.
AcceptItemType	The AcceptItemType class represents an accept response object that is used to reply to a meeting request or calendar item.
AddDelegateCompletedEventArgs	The AddDelegateCompletedEventArgs class provides data for the AddDelegateCompleted event.
AddDelegateResponseMessageType	The AddDelegateResponseMessageType class contains the status and result of a call to the AddDelegate operation. This element was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
AddDelegateType	The AddDelegateType class represents a request to add delegates to a mailbox.
AggregateOnType	The AggregateOnType class identifies the Exchange store property that is used to determine the order of grouped items for a grouped FindItem result set.
AlternateIdBaseType	The AlternateIdBaseType class is the base class for derived classes that describe item, folder, or public folder identifiers to convert.
AlternateIdType	The AlternateIdType class describes an identifier to convert in a request and the results of a converted identifier in the response.
AlternatePublicFolderIdType	The AlternatePublicFolderIdType class describes a public folder identifier to convert to another identifier format.
AlternatePublicFolderItemIdType	The AlternatePublicFolderItemIdType class describes a public folder item identifier to convert to another identifier format.
AndType	The AndType class represents a search expression that allows you to perform a Boolean And operation between two or more search expressions. The result of the And operation is true if all of the search expressions contained within the And are true.
AppendToFolderFieldType	The AppendToFolderFieldType class is not implemented. Any request that uses this class will always return an error response.
AppendToItemFieldType	The AppendToItemFieldType class identifies data to append to a single property of an item during and UpdateItem Operation.
ArrayOfDLExpansionType	The ArrayOfDLExpansionType class contains an array of mailboxes that are contained in a distribution list.
ArrayOfGroupedItemsType	The ArrayOfGroupedItemsType class contains an array of items that are returned by the FindItem method
ArrayOfRealItemsType	The ArrayOfRealItemsType class contains an array of items.
ArrayOfResolutionType	The ArrayOfResolutionType class contains an array of items that are returned by the ResolveNames method.
ArrayOfResponseMessagesType	The ArrayOfResponseMessagesType class contains an array of elements of the type ResponseMessageType that represents the response messages for a request.
AttachmentIdType	The AttachmentIdType class represents the item identifier and new change key of an item after an attachment has been attached.
AttachmentInfoResponseMessageType	The AttachmentInfoResponseMessageType class contains status and response data for attachments.
AttachmentResponseShapeType	The AttachmentResponseShapeType class identifies additional properties for the GetAttachment method to return.
AttachmentType	The AttachmentType class represents an attachment.
AttendeeConflictData	The AttendeeConflictData class is the base class for meeting attendee conflicts.
AttendeeType	The AttendeeType class represents attendees and resources for a meeting.
AvailabilityProxyRequestType	The AvailabilityProxyRequestType class identifies whether a proxy request is cross-site or cross-forest.
BaseDelegateResponseMessageType	The BaseDelegateResponseMessageType class is the abstract base class of all response messages.
BaseDelegateType	The BaseDelegateType class is the base class for derived classes that represent a request that is related to delegate management.
BaseEmailAddressType	The BaseEmailAddressType class is the base class for derived classes that represent an e-mail address.
BaseFolderIdType	The BaseFolderIdType class is the base class for derived classes that represent a folder identifier.
BaseFolderType	The BaseFolderType class is the base class for derived classes that represent a folder.
BaseGroupByType	The BaseGroupByType class represents the base class for derived classes that define grouped FindItem queries.
BaseItemIdType	The BaseItemIdType class represents the base class for IDs that represent items in a mailbox. This is an abstract class and therefore will not occur in an instance document.
BaseMoveCopyFolderType	The BaseMoveCopyFolderType class is the base class for the CopyFolderType and MoveFolderType classes.
BaseMoveCopyItemType	The BaseMoveCopyItemType class is the base class for the CopyItemType and MoveItemType classes.
BaseNotificationEventType	The BaseNotificationEventType class is the base type for event notifications.
BaseObjectChangedEventType	The BaseObjectChangedEventType class represents create, delete, and new mail events.
BasePagingType	The BasePagingType class is the base class for derived classes that represent paged views.
BasePathToElementType	The BasePathToElementType class is the base class for PathToUnindexedFieldType, PathToIndexedFieldType, PathToExceptionFieldType, or PathToExtendedFieldType classes.
BasePermissionType	The BasePermissionType class is an abstract class that defines base permissions for items and folders.
BaseRequestType	The BaseRequestType class is the base class for derived classes that represent Web service requests.
BaseResponseMessageType	The BaseResponseMessageType class represents the base class for response messages.
BaseSubscriptionRequestType	The BaseSubscriptionRequestType class is the base class for descendant classes that form the notification requests.
BodyType	The BodyType class represents the body content of an item.
CalendarEvent	The CalendarEvent class represents a unique calendar item occurrence.
CalendarEventDetails	The CalendarEventDetails class provides additional information about a calendar event.
CalendarFolderType	The CalendarFolderType class represents a folder that primarily contains calendar items.
CalendarItemType	The CalendarItemType class represents an Exchange calendar item.
CalendarPermissionSetType	The CalendarPermissionSetType class contains all the permissions that are configured for a calendar folder. This element was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
CalendarPermissionType	The CalendarPermissionType class defines the access that a user has to a calendar folder. This class was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
CalendarViewType	The CalendarViewType class represents the settings that are used to return calendar items as they appear in a calendar.
CancelCalendarItemType	The CancelCalendarItemType class represents a cancel response object that is used to cancel a meeting.
ChangeDescriptionType	The ChangeDescriptionType class is the base class that is used to describe changes in UpdateFolder and UpdateItem operations.
CompleteNameType	The CompleteNameType class represents the complete name of a contact.
ConflictResultsType	The ConflictResultsType class number of conflicts in an UpdateItem response.
ConnectingSIDType	The ConnectingSIDType class represents the account to impersonate when you are using the ExchangeImpersonationType SOAP header.
ConstantValueType	The ConstantValueType class represents a constant value in a restriction.
ContactItemType	The ContactItemType class represents an Exchange contact item.
ContactsFolderType	The ContactsFolderType class represents a Contacts folder in a mailbox.
ContactsViewType	The ContactsViewType class represents the settings that are used to return contact items based on their alphabetical display names.
ContainsExpressionType	The ContainsExpressionType class represents a search expression that determines whether a given property contains the supplied constant string value.
ConvertIdCompletedEventArgs	The ConvertIdCompletedEventArgs class provides data for the ConvertIdCompleted event.
ConvertIdResponseMessageType	The ConvertIdResponseMessageType class contains the status and result of a ConvertId request. This element was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
ConvertIdResponseType	The ConvertIdResponseType class contains a response to a ConvertId request. This element was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
ConvertIdType	The ConvertIdType class represents a request to convert item and folder identifiers between supported Exchange formats.
CopyFolderCompletedEventArgs	The CopyFolderCompletedEventArgs class provides data for the CopyFolderCompleted event.
CopyFolderResponseType	The CopyFolderResponseType class represents a response to a CopyFolder method call.
CopyFolderType	The CopyFolderType class represents an operation to copy folders in an Exchange database.
CopyItemCompletedEventArgs	The CopyItemCompletedEventArgs class provides data for the CopyItemCompleted event.
CopyItemResponseType	The CopyItemResponseType class represents the response returned by the CopyItem method.
CopyItemType	The CopyItemType class represents an operation to copy items in a mailbox.
CreateAttachmentCompletedEventArgs	The CreateAttachmentCompletedEventArgs class provides data for the CreateAttachmentCompleted event.
CreateAttachmentResponseType	The CreateAttachmentResponseType class contains the status for a call to the CreateAttachment method.
CreateAttachmentType	The CreateAttachmentType class represents a request to attach an item or file to a specified item in the Exchange database.
CreateFolderCompletedEventArgs	The CreateFolderCompletedEventArgs class provides data for the CreateFolderCompleted event.
CreateFolderResponseType	The CreateFolderResponseType class represents a response to a CreateFolder method call.
CreateFolderType	The CreateFolderType class represents a request to create a folder.
CreateItemCompletedEventArgs	The CreateItemCompletedEventArgs class provides data for the CreateItemCompleted event.
CreateItemResponseType	The CreateItemResponseType class defines a response to a CreateItem request.
CreateItemType	The CreateItemType class represents a request to create an item or response object.
CreateManagedFolderCompletedEventArgs	The CreateManagedFolderCompletedEventArgs class provides data for the CreateManagedFolderCompleted event.
CreateManagedFolderRequestType	The CreateManagedFolderRequestType class represents a request to add a managed folder to a mailbox.
CreateManagedFolderResponseType	The CreateManagedFolderResponseType class represents a response to a CreateManagedFolder method call.
DailyRecurrencePatternType	The DailyRecurrencePatternType class describes the frequency, in days, in which a calendar item or a task recurs.
DailyRegeneratingPatternType	The DailyRegeneratingPatternType class describes the frequency, in days, in which a task is regenerated.
DeclineItemType	The DeclineItemType class represents a decline item response object that is used to reply to a meeting request or calendar item.
DelegatePermissionsType	The DelegatePermissionsType class contains the delegate permission-level settings for a user. This element was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
DelegateUserResponseMessageType	The DelegateUserResponseMessageType class contains the response message for a single delegate user. This class was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
DelegateUserType	The DelegateUserType class identifies a single delegate to add or update in a mailbox, or a delegate that is returned in a delegate management response. This class was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
DeleteAttachmentCompletedEventArgs	The DeleteAttachmentCompletedEventArgs class provides data for the DeleteAttachmentCompleted event.
DeleteAttachmentResponseMessageType	The DeleteAttachmentResponseMessageType class contains the status and result of a single DeleteAttachment method call.
DeleteAttachmentResponseType	The DeleteAttachmentResponseType class contains the status of a call to the DeleteAttachment method.
DeleteAttachmentType	The DeleteAttachmentType class represents a request to delete an attachment on an item in the Exchange database.
DeletedOccurrenceInfoType	The DeletedOccurrenceInfoType class represents a deleted occurrence of a recurring calendar item.
DeleteFolderCompletedEventArgs	The DeleteFolderCompletedEventArgs class provides data for the DeleteFolderCompleted event.
DeleteFolderFieldType	The DeleteFolderFieldType class represents an UpdateFolder operation to delete a property from a folder.
DeleteFolderResponseType	The DeleteFolderResponseType class represents a response to a DeleteFolder method call.
DeleteFolderType	The DeleteFolderType class represents a request to delete folders from a mailbox.
DeleteItemCompletedEventArgs	The DeleteItemCompletedEventArgs class provides data for the DeleteItemCompleted event.
DeleteItemFieldType	The DeleteItemFieldType class represents a property to delete from an item.
DeleteItemResponseType	The DeleteItemResponseType class defines a response to a single DeleteItem request.
DeleteItemType	The DeleteItemType class represents a request to delete items in an Exchange database.
DistinguishedFolderIdType	The DistinguishedFolderIdType class identifies Microsoft Exchange Server folders that can be referenced by name. If you do not use this class, you must use the FolderIdType class to identify a folder.
DistinguishedGroupByType	The DistinguishedGroupByType class represents a standard grouping for FindItem queries.
DistributionListType	The DistributionListType class represents a distribution list.
Duration	The Duration class represents a duration of time.
EffectiveRightsType	The EffectiveRightsType class contains the client's rights based on the permission settings for the item or folder. This class was introduced in Microsoft Exchange Server 2007 Service Pack 1 (SP1).
EmailAddress	The EmailAddress class represents the address of a mailbox user.
EmailAddressDictionaryEntryType	The EmailAddressDictionaryEntryType class represents an e-mail address associated with a contact.
EmailAddressType	The EmailAddressType class represents an e-mail address.
EndDateRecurrenceRangeType	The EndDateRecurrenceRangeType class describes the start date and the end date of an item recurrence pattern.
ExchangeImpersonationType	An instance of the ExchangeImpersonationType class is used as the SOAP header of a request. When this instance is present, the caller is impersonating the account that is contained within the ExchangeImpersonationType instance.
ExchangeServiceBinding	The ExchangeServiceBinding class contains the methods and properties that are used to send and receive the SOAP messages, set up Exchange impersonation, maintain user credentials, and identify the Exchange Web Services endpoint.
ExcludesType	The ExcludesType class performs a bitwise mask of the specified property and a supplied value.
ExcludesValueType	The ExcludesValueType class represents a hexadecimal or decimal mask to be used during an Excludes restriction operation.
ExistsType	The ExistsType class represents a search expression that returns true if the supplied property exists on an item.
ExpandDLCompletedEventArgs	The ExpandDLCompletedEventArgs class provides data for the ExpandDLCompleted event.
ExpandDLResponseMessageType	The ExpandDLResponseMessageType class contains the status and result of a single ExpandDL request.
ExpandDLResponseType	The ExpandDLResponseType class defines a response to a request to expand a distribution list.
ExpandDLType	The ExpandDLType class represents a request to expand a distribution list.
ExtendedPropertyType	The ExtendedPropertyType class identifies extended MAPI properties on folders and items.
FieldOrderType	The FieldOrderType class represents a single field by which to sort results and indicates the direction for the sort in a FindItem request.
FieldURIOrConstantType	The FieldURIOrConstantType class contains either a property or a constant value to be used when comparing with another property.
FileAttachmentType	The FileAttachmentType class represents a file that is attached to an item in the Exchange store.
FindFolderCompletedEventArgs	The FindFolderCompletedEventArgs class provides data for the FindFolderCompleted event.
FindFolderParentType	The FindFolderParentType class contains the results of a search of a single root folder during a FindFolder operation.
FindFolderResponseMessageType	The FindFolderResponseMessageType class represents the response