Both mailbox creation and deletion failure scenarios heavily involve verifying the current recipient type values across all directories – especially in a directory synchronized environment. For example; if a user is listed on-prem as a remote mailbox with a cloud archive, then you should expect EXO to have a primary and an archive mailbox for this user. If it doesn’t, then troubleshoot for a synchronization failure somewhere between on-prem and EXO.
The three attributes you will be dealing with are the following, and there are many possible values for each:
- msExchRemoteRecipientType
- msExchRecipientDisplayType
- msExchRecipientTypeDetails
Details