Signatures are not applied to emails from shared mailboxes

Scenario

When an email is sent from a shared mailbox, a signature is not added to the received email message.

Reason

By default, these accounts are disabled, or their logins have been disabled. This means that the Exclaimer service will not aggregate these; therefore, dynamic signatures are not applied to these mailboxes.

This occurs when the 'Synchronize Disabled Accounts' feature has not been enabled for your tenant.

To generate signatures, Exclaimer aggregates data from the Active Directory, however:

If the feature is disabled, then disabled mailboxes are not synchronized during Exclaimer's data sync.

If the feature is enabled, all users with a primary SMTP address are synced, even if they are disabled.

Resolution

To synchronize disabled accounts:

1. Log into your Exclaimer account and launch your subscription.
   
   
2. From the header bar, select the cogwheel icon to open the Settings menu.
   
   
3. Select Sender Management.
   
   
   _{Open the Sender Management page.}
   
   
4. From the Synchronize Disabled Accounts section, select the Synchronize Disabled Accounts option to synchronize disabled accounts in Microsoft 365.
   
   
   _{The Synchronize Disabled Accounts option is selected.}
   
   
5. Select Save to save the changes made.