c# - Update appointments in one service call using EWS managed API 2.0 -

i'm setting custom extended property each existing appointment that:

var extendedpropertydefinition = new extendedpropertydefinition(defaultextendedpropertyset.publicstrings, "ratethemeetingid24", mapipropertytype.integer); var propertyset = new propertyset(propertyset.firstclassproperties) { extendedpropertydefinition }; appointment.load(propertyset); appointment.setextendedproperty(extendedpropertydefinition, meetingid); 

and i'm updating appointment:

appointment.update(conflictresolutionmode.alwaysoverwrite); 

it works fine, slow, because update() creates call exchange every appointment. update meetings in 1 single call. can make list of appointments setted custom property , use that:

updateappointment(list<appointment> appointmentswithextendedpropertysetted) {     appointmentswithextendedpropertysetted.updateall(); } 

i have found reference in msdn updateitems method: exchangeservice.updateitems method

but don't know how use it.

i got asnwer how solve probem msdn forum: update appointments in 1 service call

i need set property 1 appoitment @ time , add batch, after set properties appointments need use _service.updateitems() method appointments batch:

pulic void updateappointments(list<item> _updatebatch) {     service.updateitems(upupdatebatch, folder.id, conflictresolutionmode.alwaysoverwrite, messagedisposition.saveonly, sendinvitationsorcancellationsmode.sendtonone); }