Question: I manage a shared account in which my signature block is different than my personal one. I tried to see how to create a separate signature block for that account and it didn’t work.
Answer: On the Outlook client you can create many signatures from your account, including a signature you plan to use for the shared account. When you send email out on behalf of that other account, you can select the appropriate signature. You might also consider using Outlook Web Access for the shared account if you have full access permission and then you can switch to the other account (as described in the previous posting). You can then create a special signature for that account under Options > See all Options > Settings > Mail and check to have it automatically include on messages you send.