Relevant Product: Exclaimer Cloud - Signatures for Office 365
If a user sends an email, for approval, to a distribution group then no signature is applied to the email. But, if the user sending the email is an approver or the owner of the distribution group, then that user's signature is applied to the emails.
This issue occurs when the Exclaimer Cloud rule is configured to have a group membership requirement for emails that are sent to Exclaimer Cloud. In case of the group membership requirement, the moderated email has a unique email address attached to it rather than the sender's original email address and this causes the email to not match the conditions of the Office 365 rule.
To resolve this issue, remove the group requirement condition, but leave The sender is located condition to ensure that a signature is added to the distribution group emails.
Follow these steps to locate the transport rule and remove the group requirement condition:
- Sign in to Office 365 then navigate to the Exchange admin center.
- Click mail flow on the left-hand side then select the rules tab on the right-hand side.
- Double-click the Identify messages to send to Exclaimer Cloud transport rule.
- Remove the condition The sender is a member of (highlighted below):