When accessing a shared mailbox from your individual account using Outlook on Windows, the signature placed into the message will be from your individual account. You can change the default signature, or you will need to edit the signature in each message.

To create a new signature:

1. Go to the File tab.
   
   
   
   
2. Click Options.
   
   
   
   
3. Click on the Mail menu at the left. Click on the Signatures button to open the Signatures and Stationary window.
   
   
   
   
4. In the Email Signature tab, click New.
   
   
   
   
5. Type in a name for the New Signature such as “Shared Mailbox Signature,” and click OK.
   
   
   
   
6. Under Edit Signature, type in the shared mailbox signature.
   
   
   
   
7. When finished, click OK then OK again.

These steps will be more useful if you have many messages to process:

1. Go to the File tab.
   
   
   
   
2. Click Options.
   
   
   
   
3. Click on the Mail menu at the left. Click on the Signatures button to open the Signatures and Stationary window.
   
   
   
   
4. Under Choose default signature select the shared mailbox signature for New Messages and Replies/forwards.
   
   
   
   
5. Click OK then OK again.

When you are finished using the shared mailbox, you will need to revert back to your individual signature. Just follow the above instructions but this time, select your individual signature.