Setting Up (Mailbox, Calendar, People and Tasks)

Mailbox, calendar, People and Tasks stuck in Setting Up.

Why does this happen?

In step 1: The admin connects to the Office 365 admin center in the Microsoft cloud platform to create or manage users.

In step 2: The create or manage requests are passed on to Azure AD.

In step 3: If this is a change request, the change is made and copied back to the Office 365 admin center.

In step 4: New user accounts and changes to existing user accounts are copied back to the Office 365 admin center.

Sometimes this process gets stuck. We send a change request by removing and adding the license. If this fails then a Recipient Object full sync is required.

https://support.office.com/en-us/article/Understanding-Office-365-identity-and-Azure-Active-Directory-06a189e7-5ec6-4af2-94bf-a22ea225a7a9?ui=en-US&rs=en-US&ad=US#BK_Cloud