added link for "further instructions"

documentation/microsoft365.markdown

@@ -54,3 +54,9 @@ Please refer to the [pdf](https://unlimited.ethz.ch/download/attachments/2923652
   * Login with your credentials `nethz-username@ethz.ch` and ETH password
   * Click on `Install Office`
   * Run the downloaded file and follow the install instruction
+
+
+
+Further instructions
+--------------------
+See [here](https://unlimited.ethz.ch/display/itwdb/Microsoft+365) for further instructions.