I have a plugin ex:which updates all its child records when that is updated.
This plugin is registered to execute in offline mode as well.
I have done this using ExecuteMultipleRequest. This is working fine when I am updating the parent record from CRM instance.
When I go offline and try to update the parent record its throwing business process error "executemultiplemaxbatchsize".
I checked the exception with Debugging it is as below.
System.NotImplementedException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #ABA895C7
Does ExecuteMultipleRequest work in Outlook offline mode?
As per MSDN link https://msdn.microsoft.com/en-in/library/microsoft.xrm.sdk.messages.executemultiplerequest.aspx
it says
This message works regardless whether the caller is connected to the server or offline.
Per the SDK documentation it should but I think that is typo in the documentation. You can open a ticket with Microsoft and they'll probably correct the documentation but not change the functionality.
The reason I believe it's a documentation is is that there is NO reason to use ExecuteMultipleRequest in a plugin. Since there is no SOAP overhead or latency - because the plugin is running on the server and does not use the Organization.svc endpoint - you don't gain any benefit from using ExecuteMultipleRequest in a plugin. ExecuteMultipleRequest is intended for use in client applications to improve performance, not for plugins and workflows.