1. If you haven't already done so, set the macro (macro: An action or a set of actions you can use to automate tasks. Macros are recorded in the Visual Basic for Applications programming language.) security level to Medium or High.

   How?

   1. On the Tools menu, click Options.
   2. Click the Security tab.
   3. Under Macro Security, click Macro Security.
   4. Click the Security Level tab, and then select the security level you want to use.
2. Open the file or load the add-in (add-in: A supplemental program that adds custom commands or custom features to Microsoft Office.) that contains macros certified by the macro developer that you want to add to the list.
3. In the Security Warning box, select the Always trust macros from this publisher check box.

Note  If the Security Warning box does not display the Always trust macros from this publisher check box, the macros are not digitally signed (digital signature: An electronic, encryption-based, secure stamp of authentication on a macro or document. This signature confirms that the macro or document originated from the signer and has not been altered.). You cannot add this macro developer to the list of trusted sources without a digital signature.

1. On the Tools menu, click Options, and then click the Security tab.

2. Under Macro Security, click Macro Security.
3. Click the Trusted Publishers tab.
4. Click the source you want to remove from the list.
5. Click Remove.