Sometimes, an Office 365 migration results in some mailboxes in the wrong language.
You can bulk set the language and time zone for all users in Office 365 by using these Powershell scripts:
Dont, forget to connect to Office 365 first.
get-mailbox -ResultSize unlimited | Set-MailboxRegionalConfiguration -Language -TimeZone
In the
Read more… [Solved] Office 365: Bulk set Language and Time Zone for all users in Office 365