When starting „outline numbering“ with a different number than „1“, hyperlinks 
in an index do not work as expected. 
Example:

1.Outline numbering of the first heading-level starts with „2“.

2.An index is created with hyperlink-formatting of the first-level-entries

3.While moving the mouse over the first index-entry it shows:
"#1. [title of chapter] | outline"
instead of
"#2. [title of chapter] | outline"

4.When I click on this hyperlink the cursor stays within the index-entry-line.
When I click on the second index-entry, the cursor moves to the first chapter, a 
click on the third entry leeds to the second chapter and so on.
The hyperlinks seem to ignore the changed numbering and act as if outline-
numbering would start with „1“.

5.When editing manually the hyperlink in the index-entry (index as „not 
protected“, then: mark the hyperlink and chose: insert/hyperlink) and overwrite 
it to:
"#2. [title of chapter] | outline"
it would work as desired.