Exchange Online mailbox defaults to Pacific Time
Mailboxes in Exchange Online have two timezones; one in regional settings and the other in working hours. These are both set to Pacific Standard Time by default, regardless of where in the world the mailbox is created or what tenant or Exchange regional settings are in place. This behaviour is by design, according to Microsoft support. The first time a mailbox is accessed by a user, these settings are determined based on their location and the defaults are changed automatically (most of the time)....