New Outlook – Font settings for everyone

With the New outlook, you need to change settings on the server side, per user.
If new user is created, this setting needs to be set again 🙁

First of all, install and load the exchange module (I’m using PowerShell 7.6.3)

# Download and Load Exchange Module
Install-Module ExchangeOnlineManagement -Scope CurrentUser
Import-Module ExchangeOnlineManagement

# Connect to the tenant
Connect-ExchangeOnline -UserPrincipalName admin@jouwdomein.nl

And Confirm the 365 sign-in popup

Now check a mailbox with the current settings:

Get-MailboxMessageConfiguration -Identity user@joudomain.nl

AfterMoveOrDeleteBehavior              : OpenNextItem
NewItemNotification                    : All
EmptyDeletedItemsOnLogoff              : False
AutoAddSignature                       : False
AutoAddSignatureOnReply                : False
SignatureText                          :
SignatureHtml                          :
SignaturesList                         :
SignatureName                          :
SignatureHtmlBody                      :
DefaultSignature                       :
DefaultSignatureOnReply                :
DeleteSignatureName                    :
AutoAddSignatureOnMobile               : True
SignatureTextOnMobile                  :
UseDefaultSignatureOnMobile            : True
DefaultFontName                        : Calibri
DefaultFontSize                        : 3
DefaultFontColor                       : #000000
DefaultFontFlags                       : Normal
AlwaysShowBcc                          : False
AlwaysShowFrom                         : False
DefaultFormat                          : Html
ReadReceiptResponse                    : DoNotAutomaticallySend
PreviewMarkAsReadBehavior              : OnSelectionChange
PreviewMarkAsReadDelaytime             : 5
ConversationSortOrder                  : ChronologicalNewestOnTop
ShowConversationAsTree                 : False
HideDeletedItems                       : False
SendAddressDefault                     :
EmailComposeMode                       : Inline
CheckForForgottenAttachments           : True
AreFlaggedItemsPinned                  : False
IsReplyAllTheDefaultResponse           : True
KeyboardShortcutsMode                  : Owa
LinkPreviewEnabled                     : True
ShowPreviewTextInListView              : True
ShowUpNext                             : True
GlobalReadingPanePosition              : Right
IsFavoritesFolderTreeCollapsed         : False
IsMailRootFolderTreeCollapsed          : False
MailFolderPaneExpanded                 : True
IsHashtagTreeCollapsed                 : False
IsGroupsTreeCollapsed                  : False
GroupSuggestionDismissalCount          : 0
GroupSuggestionDismissalDate           :
ShowSenderOnTopInListView              : True
ShowReadingPaneOnFirstLoad             : False
NavigationPaneViewOption               : Default
AllOwaConfiguration                    :
PreferAccessibleContent                : False
EchoGroupMessageBackToSubscribedSender : False
SmimeEncrypt                           : False
SmimeSign                              : False
SigningCertificateSubject              :
ManuallyPickCertificate                : False
SigningCertificateId                   :
ReportJunkSelected                     : False
CheckForReportJunkDialog               : False
MailSendUndoInterval                   : 0
WebSuggestedRepliesEnabledForUser      : False
ShowNotificationBar                    : False
IsDarkModeTheme                        : False
IsFocusedInboxEnabled                  : False
ShowInlinePreviews                     : False
DisplayDensityMode                     : Full
FavoritesBitFlags                      : 0
NavigationBarWidth                     : 0
NewEnabledPonts                        : None
MailboxOwnerId                         : 77956c6b-c040-4556-9201-ef2d971a38d9
Identity                               : 77956c6b-c040-4556-9201-ef2d971a38d9
IsValid                                : True
ObjectState                            : Unchanged

Now set the default Fontname and FontSize like below for all users in this tenant.

Get-Mailbox -ResultSize Unlimited | ForEach-Object {
    Set-MailboxMessageConfiguration `
        -Identity $_.UserPrincipalName `
        -DefaultFontName Arial `
        -DefaultFontSize 11
}

Now you can check on the client side if the settings are set (Its set to all)

Below is the setting per user.

set-MailboxMessageConfiguration -DefaultFontName Arial --DefaultFontSize 11 -Identity user@joubedrijf.nl