Change email address

Question

Hi All,

I have a booking mailbox, let's say its email address is bm@contoso.onmicrosoft.com. One of my users utilizes this booking mailbox and has scheduled numerous invites to external users. I have a requirement to change the booking mailbox's email address from bm@contoso.onmicrosoft.com to bm@contoso.com. Will there be any impact on the previously scheduled invites if I make this change?

Please guide me on how to change the booking mailbox email address from powershell, and let me know if it's possible to set bm@contoso.onmicrosoft.com as a secondary email address.

Answer 1

Hi, @Roger Roger

When you change the primary email address of your booking mailbox, the previously scheduled invitation is usually still valid. These invitations are usually associated with the mailbox itself, rather than a specific email address. However, it is best to notify external users of this change to avoid any confusion.

In Exchange on-premises, you can use the following command in Power Shell to modify the primary email address of a mailbox.

Set-Mailbox -Identity "bm@contoso.onmicrosoft.com" -PrimarySmtpAddress "bm@contoso.com"

You can then set up the secondary email address using the following command.

Set-Mailbox -Identity "bm@contoso.com" -EmailAddresses @{add="bm@contoso.onmicrosoft.com"}

In Exchange Online, you can manage the email address in the EAC.

1.Select the mailbox you want to modify, and select "Manage email address types"

2.Select "Add email address type"

3.Enter the bm@contoso.com and check "Set as primary email address", click Save and the old email address will automatically become a secondary email address.

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Answer 2

When you change the email address, the previously schedule invites will not be affected because the mailbox is still same, only the email address changes.

Follow the PowerShell commands to change the email address-

1.       Connect to Exchange Online Connect-ExchangeOnline

2.       Add the new Primary email address Set-Mailbox -Identity bm@contoso.onmicrosoft.com -PrimarySmtpAddress bm@contoso.com -EmailAddresses @{add="bm@contoso.onmicrosoft.com"}

3.       After this you can verify by running the command Get-Mailbox -Identity bm@contoso.com | Select-Object PrimarySmtpAddress, EmailAddresses

Let me know if you any query in above steps.

 

Answer 3

I am getting below error

PS C:\windows\system32> Set-Mailbox -Identity bm@contoso.onmicrosoft.com -PrimarySmtpAddress bm@contoso.com

Set-Mailbox : A parameter cannot be found that matches parameter name 'PrimarySmtpAddress'.

At line:1 char:59

• ... ntity bm@contoso.onmicrosoft.com -PrimarySmtpAddress bm ...
  • CategoryInfo : InvalidArgument: (:) [Set-Mailbox], ParameterBindingException
  • FullyQualifiedErrorId : NamedParameterNotFound,Set-Mailbox

Answer 4

i can see the booking mailbox in M365 Admin center not Exchange Admin center. is this expected behaviour.

Answer 5

using the below syntax i have changed the email address but still booking mailbox invites are going with bm@contoso.onmicrosoft.com. it has been 24 hours. it is possible to change upn from bm@contoso.onmicrosoft.com to bm@contoso.com. please guide me.

Set-Mailbox -Identity bm@contoso.onmicrosoft.com -EmailAddresses "SMTP:bm@contoso.com","smtp:bm@contoso.onmicrosoft.com"