Forum Post: RE: Does accepting or declining appointments in Outlook affect CRM?

Hello Egor,

Optional attendees who accepts the appointment or request don't show up in the service calendar. This seems to happen on all CRM Orgs and its by design as If a user is kept optional, it is not considered that the  user “busy” during this time in the service calendar.

I would suggest you to vote on the link below.

connect.microsoft.com/.../microsoft-dynamics-crm-2011-service-calende-is-not-showing-the-blocked-time-for-the-optional-attendee

Thank You !