Exchange Online

Accepted domains

Accepted domains are the SMTP name spaces (also known as address spaces) that you configure in an Exchange organization to receive email messages. You use the Exchange admin center (EAC) or the Exchange Management Shell to configure accepted domains in Exchange Server. For more information about accepted domains, see Accepted domains in Exchange Server. The …

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SPF, DKIM & DMARC

What’s an SPF record? An SPF record is a Sender Policy Framework record. It’s used to indicate to mail exchanges which hosts are authorized to send mail for a domain. * SPF (Sender Policy Framework) is an authentication protocol that allows senders to specify which IP addresses are authorized to send email on behalf of …

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Delete Calendar Event only on Microsoft 365

 There is a newly deployed cmdlet to Office 365 tenants: Remove-CalendarEvents. This cmdlet is currently only available in Exchange Online, but it does allow administrators to remove calendar events, with an attendee, from an owner’s mailbox. Here are three examples: Remove-CalendarEvents -Identity [email protected] -CancelOrganizedMeetings This example cancels every meeting in the mailbox [email protected] that occurs …

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Mailbox showing migrated but not showing in Microsoft 365

Issue: Unable to find mailbox  Resolution: Since this was a returning user and there was no hold (LitigationHoldEnabled: False) on the user, there was a possibility that the mailbox might be deleted already. We confirmed that by running Get-Mailbox <User> -SoftDeletedMailbox and Get-Mailbox <User> -InactiveMailboxOnly, no object was found using those commands. Get-Mailbox [email protected] -SoftDeletedMailbox Get-Mailbox …

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