MOERA domains for email
When a organization creates a new tenant in Microsoft 365, an onmicrosoft.com domain (or similar default domain like onmicrosoft.de) is provided. These MOERA (Microsoft Onli...
Updated Mar 30, 2026
Version 9.0
Blog Post
SeanMSFT
Microsoft
MicrosoftHi Alex,
As mentioned in DM, Teams and Groups will have to change their address if they want to avoid throttling for any scenarios where they send emails externally.
I will have to follow up with the owner of Public Folders to understand the hierarchy sync emails better
Hi SeanMSFT !
Thank you.
one additional thing came in my mind... What about the default email address policy?
This still uses the default onmicrosoft.com address/domain, even after changing the default domain to a custom domain and is being used e.g. if creating a new distribution list:
Get-EmailAddressPolicy | select name,priority,recipientfilter,*AddressTemplate*
Name : Default Policy
Priority : Lowest
RecipientFilter : Alias -ne $null
EnabledPrimarySMTPAddressTemplate : @<default>.onmicrosoft.com
EnabledEmailAddressTemplates : {SMTP:@<default>.onmicrosoft.com}
DisabledEmailAddressTemplates : {}
new-distributiongroup achwasbinichlustig
Name DisplayName GroupType PrimarySmtpAddress
---- ----------- --------- ------------------
achwasbinichlustig achwasbinichlustig Universal achwasbinichlustig@<default>.onmicrosoft.com
get-accepteddomain | ? {$_.Default -eq $true}
Name DomainName DomainType Default
---- ---------- ---------- -------
<custom>.com <custom>.com Authoritative True
- SeanMSFT
Yes, that would definitely need to be changed if it overrides the default accepted domain.
Hi.
The 'problem' is I am not able to change this...(You are not authorized to perform this operation on e-mail address policy):
Set-EmailAddressPolicy -Identity "Default Policy" -EnabledEmailAddressTemplates "SMTP:@<domain>.com","smtp:@<default>.onmicrosoft.com" Set-EmailAddressPolicy: ||You are not authorized to perform this operation on e-mail address policy "Default Policy".