Office 365 – Moving online mailbox to on premise failed with error Resource ’CiAgeOfLastNotification(System)’ is unhealthy and shouldn’t be accessed
Recently, I went to an error when moving online mailboxes from Office 365 – Exchange Online – to on premises – Exchange 2013. Strangely, these mailboxes have been moved multiple times in both direction – on premises to online and online to on premises – without any issue. The migration batch starts and content is

