Change TimeZone on mailboxes

Do you have one or more mailboxes running in a wrong TimeZone on your Office 365 or Exchange environment? Don’t worry it is easy to fix, and I will show you how do to it. Follow this blog post and you will learn how to see current TimeZone on a mailbox, how to change it, and how to changes TimeZone on all mailboxes.

See current TimeZone on a mailbox
To see current TimeZone on a mailbox, simply use this command.

Change TimeZone on one mailbox

To change the TimeZone on a mailbox we need to use Set-MailboxRegionalConfiguration like below.

Change TimeZone on all mailboxes

You can use following PowerShell command to change the TimeZone on all mailboxes.


Not sure which TimeZone to use? Please see the TimeZone tabel on Microsoft’s website (

By | 2017-08-21T21:18:34+00:00 October 28th, 2011|Office 365|2 Comments

About the Author:

Brian Fahrenholtz


  1. Bruce Olschewski February 11, 2012 at 1:32 - Reply

    Brian, how would you modify the all users script if your user are in 3 different time zones? Can you create something like an if/then where a user is part of a security group or distribution group so they get time zone A?

  2. Their such as you learn my head! You appear to understand a good deal with this, just like you wrote the hem ebook there as well. I believe that you recently could employ several Pct to just make the message residence a bit, even so besides these very, this really is superb site. An excellent examine. I will surely be back.

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