Mike's wizard approach is fine too, but here is an example of what I was referring to:
Create a new catalog item to accept the updates. In my simple example I prompt for mobile phone and department. Each of these variables has a default value of:
Mobile Phone: javascript:gs.getUser().getMobileNumber();
Department: javascript:gs.getUser().getDepartmentID()
These functions can be found here: http://wiki.servicenow.com/index.php?title=Getting_a_User_Object#gsc.tab=0
Then create a UI action to call this new catalog item from the user profile. I set mine as a button and the script to run is basically the URL link from your service catalog. I went to the catalog and right clicked on the item and chose "copy link address" in Chrome. Once you have that, the script in the UI action should look similar to the following:
action.setRedirectURL("com.glideapp.servicecatalog_cat_item_view.do?v=1&sysparm_id=9f1b256f0f2c460088641d2be1050ed1&sysparm_link_parent=e15706fc0a0a0aa7007fc21e1ab70c2f&sysparm_catalog=e0d08b13c3330100c8b837659bba8fb4&sysparm_catalog_view=catalog_default");
Once setup, here is the user profile with fields read only and button:
Then once you click Update Profile, this shows up:
From there your workflow can do whatever you need like update the user's record in ServiceNow and also create tasks to your fulfillers to update the external databases.
