@MojoDK, I fear you've just got your version number wrong. You've got
16 and it should be
16.0. Using the corrected version, I was able to disable warning messages for a custom protocol in Office365.
For people in a hurry
Download and edit this
.reg file according to the enclosed instructions with something like Notepad++. Once you've edited it, running the file will create any necessary registry keys for you.
For people... not in a hurry
Below are some of my own recommendations for doing it manually, along with Microsoft's instructions on how to disable the warnings on a protocol-by-protocol basis.
How to enable or disable hyperlink warnings per protocol
To disable the display of security warnings for a specific protocol,
follow these steps:
Click Start, click Run, type regedit, and then click OK.
Locate [or create] the following registry subkey:
Note: In this subkey, replace "xx.0" with [your version of Office; see below table§].
Click the All Applications subkey.
On the Edit menu, point to New, and then click Key.
Type the name of the protocol that you want to exclude. For example, to disable the display of a security warning for the "Notes:"
protocol, type Notes:.
Note: Make sure that you include the colon (:) character.
Exit Registry Editor.
Things to double check:
Your office version§
There is a different registry key for every version of office. To find your version, in any Microsoft Office Application, look under something to the tune of
File > Office Account > Click About Outlook
then look near the top to find your XX.X office version. (Note 1808 is not the version number you're looking for.)
I've got Microsoft Office 365 and here's what mine looks like:
You can also find your version using this table from Wikipedia (which I've copied the essence of below).
| Office | Version Number |
|------------- |----------------- |
| Office 2000 | 9.0 |
| Office XP | 10.0 |
| Office 2003 | 11.0 |
| Office 2007 | 12.0 |
| Office 2010 | 14.0 |
| Office 2013 | 15.0 |
| Office 2016 | 16.0 |
| Office 2019 | 16.0 |
In the end, my registry ended up looking like this: