> ## Documentation Index
> Fetch the complete documentation index at: https://docs.superoffice.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to accept an invitation (services)

> How to accept an invitation using NetServer services

This example shows how to accept an [invitation][2] through the [NetServer services][3] layer with just a few code statements.

We use NetServer providers (plugins created with a Factory class) to retrieve information on invitations for a specific associate.

`IArchiveProvider` is the external standard interface of archive providers exposed to the service layer and the world in general. The interface aggregates the extensible and provider properties of classes such as `ActivityArchiveProvider`, `ProjectMemberProvide`, and `InvitationProvider`. This acts as an intermediate stage between the pure property interface and the actual provider class that has queries.

After getting an overview by [listing invitations for an associate][1], we plan to accept the invitation with `appointmentId = 150`. This is done using the [AppointmentAgent][4] from the `SuperOffice.CRM.Services` namespace. All calls to the agent correspond to a web service services call.

## Code

```csharp theme={null}
using SuperOffice;
using SuperOffice.CRM.ArchiveLists;
using SuperOffice.CRM.Services;

using(SoSession newSession = SoSession.Authenticate("sam", "sam"))
{
  //Creating an instance of the Appointment Agent
  using(AppointmentAgent newAppAgt = new AppointmentAgent())
  {
    //Accepting the invitation
    AppointmentEntity newAppEnt = newAppAgt.Accept(150,SuperOffice.Data.RecurrenceUpdateMode.OnlyThis);
  }
}
```

## Walk-through

In the example, we have created an instance of the `AppointmentAgent` and called its `Accept` method passing the `appointmentId` and the `UpdateMode`.

**Output:**

```text theme={null}
associate/contactFullName    date        endDate           appointmentId
StateZeroDatabase       [D:07/05/2007]    [D:07/05/2007]    [I:186]
StateZeroDatabase       [D:07/26/2007]    [D:07/26/2007]    [I:179]
StateZeroDatabase       [D:04/28/2007]    [D:04/28/2007]    [I:172]
StateZeroDatabase       [D:06/14/2007]    [D:06/14/2007]    [I:161]
```

The reason that the details of an invitation with `appointmentId` 150 is not shown (like it did when we [listed it][1]), is that once the invitation has been accepted it becomes a normal appointment without the invitation status set and it can no longer be retrieved by using the [InvitationProvider][5].

[1]: ./get-invitations-services

[2]: ../../../../diary/learn/invitation/index

[3]: ../../index

[4]: ../../../reference/restful/agent/Appointment_Agent/index

[5]: ../../../archive-providers/reference/invitation


## Related topics

- [How to accept an invitation](/en/automation/crmscript/howto/diary/accept-invitation.md)
- [How to create an invitation (services)](/en/api/web-services/howto/diary/create-invitation-services.md)
- [How to get a list of invitations (services)](/en/api/web-services/howto/diary/get-invitations-services.md)
- [Accept invitations](/en/email/inbox/learn/invitations.md)
- [Accept and decline invitations](/en/mobile/diary/invitations.md)
- [Accept](/en/api/reference/restful/agent/appointment_agent/accept.md)