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Monthly Archives: June 2026
Immutable SMTP aliases in Exchange Online
In researching why we couldn’t remove a *@[PRIMARY TENANT DOMAIN].onmicrosoft.com SMTP alias as part of an account re-name clean-up we discovered and confirmed with MSFT support that upon creation of a mail object in Exchange online, a permanent address of <alias>@<primary_tenant_domain>.onmicrosoft.com is given … Continue reading
Posted in Exchange Online, Microsoft 365
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