Dear all,

we have worldwide round about 40.000 Outlook users in our organization and hundreds of rooms. We noticed that some of the rooms change their time zone setting to different values and we don't know why this occurs. Do you have a hint? Thank you.

• Edited by ChristianSchroeder 23 hours 18 minutes ago

I suspect someone with permissions is doing that.  Try revoking everyone's permissions and see if the problem goes away.

Hi,

It may be changed by other users who have owner permission to the room mailbox. We can try to run the following command to set the Time Zone for all room mailboxes:

$Rooms = Get-Mailbox -ResultSize unlimited -Filter{(RecipientTypeDetails -eq 'RoomMailbox')}

$Rooms | %{Set-MailboxRegionalConfiguration $_.Identity -TimeZone "Pacific Standard Time"}

You can replace "Pacific Standard Time" with the time zone that's appropriate for you. Then check whether the time zone for room mailbox is correct or not.

Regards,