Emails Rejected for Azure Disabled Accounts

Situation – Why are mail emails being rejected for not-Active Accounts / Disabled Accounts in Azure.

Solution – Spambrella is honoring the Not Active/Active flag within Azure. See below for instructions on how to enable mailflow for Block Sign-In set accounts in Office 365.

Why Are My Emails Being Rejected For Non-Active In Spambrella/Disabled Accounts In Azure?

There has been a change in the behavior of Spambrella, where we are now honoring the Disabled flag given by Azure.

Accounts that are Block Sign-In in Azure from logon, will be replicated and Not Active in Spambrella/Proofpoint. This will also prevent mail-flow to that address.

To access the Block Sign-In setting within Office 365:

  1. Open Exchange Admin Center.
  2. Navigate to Active Users and search for the mailbox.
  3. Click on the address.
  4. Block Sign-In can be seen.


  • If you are experiencing mail flow issues to accounts, check if the Block Sign-In setting is set to Disabled or Active. Active will need to be set to allow mail flow.
  • If set to Block Sign-In, the account in Spambrella/Proofpoint will be honored and set to Not Active.

How To Enable Mailflow For Block Sign-In Set Accounts In Office 365:

Within Spambrella:

  1. Navigate to User Management > Users.
  2. Set the account from Not Active to Active by selecting Activate User.


  1. Navigate to User Management > Import & Sync > Azure Directory Sync.
  2. Click Save & Run Sync Now.
  3. Under Adding/Updating, click Exempt From Sync on the right side of the window.


  1. Click Sync Active Directory.

This prevents future syncs from converting the Active status to Non – Active and mail flow will not be impacted.

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