SOLVED: How To Add a Custom Signature to Each User Within The M365 Exchange Portal

To add a custom signature for each user via the Microsoft 365 Exchange portal, follow these steps:

1. Sign in to the Exchange admin center:
   • Use an Exchange Online administrator account to sign in
2. Navigate to Mail flow:
   • In the admin center, select Exchange
   • Go to Mail flow and then select Rules
3. Create a new rule:
   • Select Add a rule button and then choose Apply disclaimers
4. Configure the rule:
   • Name: Enter a unique name for the rule
   • Apply this rule if: Select the conditions that identify which messages get the disclaimer
     • We often use THE SENDER > IS EXTERNAL/INTERNAL > InOgranization
   • Do the following: Leave Append a disclaimer selected
   • Enter text: Type your disclaimer or signature text
     • The text of the signature can use HTML
     • You can query items from Active Directory, such as title and phone number, in your disclaimer signature in Microsoft 365 Exchange. This is done by using placeholders in your HTML code that correspond to the Active Directory attributes
       <div>
<p>Regards,</p>
<p>{DisplayName}</p>
<p>{Title}</p>
<p>{PhoneNumber}</p>
</div>
   • Select one: Choose Wrap as a fallback option
   • Except if: Choose any exceptions if needed (e.g., specific senders or recipients)
5. Finalize the rule:
   • Choose Next and configure the rule mode (e.g., Enforce to activate immediately)
   • Set the Severity level and any activation/deactivation dates
   • Select Finish to complete the setup

For more detailed instructions, you can refer to the Microsoft Learn article or the Exchange Online documentation.