How to fix Microsoft graph api throws The mailbox is either inactive, soft-deleted, or is hosted on-premise while creating event

Question

I want to create meeting event. I have added user in azure ad and also assigned delegated permission Calendars.ReadWrite.

But while creating event by following lines it throws error:
var response = await graphClient.Me.Calendar.Events.Request().AddAsync(@event);

Code: MailboxNotEnabledForRESTAPI Message: The mailbox is either inactive, soft-deleted, or is hosted on-premise.

Answer 1

Hi @Subasri

This error means the current user is missing an available EXO mailbox, please try granting an Office 365 license to this user.

Hope this helps.

If the reply is helpful, please click Accept Answer and kindly upvote it. If you have additional questions about this answer, please click Comment.

Answer 2

how to add EXO Mailbox and Office 365 license